I think I have put together a fairly complete time line for CPT Hart. One thing that is different than my previous understanding, Hart was back in Arkansas reorganizing his battery under Hindman, well before the Court of Inquiry that cleared several former members of his battery of misconduct at Pea Ridge:
* Late Spring of 1861, Organized at Dallas, Polk County, Arkansas.
* August 1, 1861, Enlisted in Confederate service at Fayetteville on
* January 1862, Assigned to Colonel Louis Herbert's 2nd Brigade, Colonel James McIntosh Division
* March 7–8, 1862, Battle of Pea Ridge (Elkhorn Tavern) in Benton County, Arkansas,
* March 17, 1862, Assigned to Brigadier General D. M. Frost's artillery brigade of Major General Sterling Price's Division.
* March 22, 1862, General Orders No. 10 disbanded the battery “for shameful conduct in the presence of the enemy.”
* May 9, 1862. Engagement at Farmington, Miss. Captain William Hart, Late of Hart’s Battery, desired and was permitted to act as gunner at one of the Howitzers, whre if report be true, he served with considerable effect” Report of Capt David Provence, Arkansas Battery.
* Little Rock June 12th [1862] Mr. R.C. Hill Pine Bluff, Capt Hart is east of Mississippi. R.C. Newton A.A. Genl http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=11031&CISOBOX=1&OBJ=11175&ITEM=362
* June 14th 1862, Head Quarters Army of the South West Little Rock Arks. Special Orders No 4 }V 1st Lieut D.S.O. Cornell is assigned to duty in Capt W. [William] Hart's Company of Artillery, and will report to him with the Ten men, which he now has, for duty. http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=9250&CISOBOX=1&OBJ=9396&ITEM=9
* June 17th 1862. Head-Quarters Army of the South West Little Rock Arks. Special Orders No 7 X Col F. [Francis] A. Shoup will assume command of Col Pleasant's "1st Trans Miss Infantry". Daniel's Lamar Artillery and [William] Hart's Company of Artillery, and more the same -, the last named with its heavy guns across the Arkansas River at daylight in the morning, and to Devalls Bluff [Arkansas] on White River by such mode as he may consider most, expeditious. If Col [Allison] Nelson is not at Deval's Bluff, Col Shoup will assume command there and adopt the best means practicable, for holding the place and resisting the progress of the Federal Gun Boats & transports up White River. Should Col Nelson be at that place, however, Col Shoup will report to him and remain there as his second in command. http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=9260&CISOBOX=1&OBJ=9396&ITEM=22
* June 18 1862, Head Quarters Army of the South West Little Rock Arks. Special Orders No 8 IV Capt Wm [William] Hart comd'g Artillery Company, is authorized to send Leut D. L. O'Connell to Pulaski Co. for the purpose of bringing to this place the Company lately commanded by George Peil, and disbanded on the 17th inst. to be attached to Capt Harts Artillery. Lieut O'Connell will be authorized to enroll and muster into Capt Harts Co. the following named persons, who are subject to conscription, to wit: Calvin Pemberton, Nimrod Clark, N.J. Smith Wm [William] Campbell, John Morrison, James Brodie and John Brodie. http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=9262&CISOBOX=1&OBJ=9396&ITEM=25
*June 19th 1862, Head Quarters Army of the South West. Little Rock Arks. Special Orders No 9. II Col A.C. Robertson will report the men he has in charge, to Capt [William] Hart, to be attached to his Artillery Co, until further orders. III Special Order No 8 paragraph 4, authorizing Capt. "To send D.S. O'Connell to Pulaski Co for the purpose of bringing to this place the Company lately commanded by Geo [George] Peil &c &c" is hereby counter-manded. Capt Peil will proceed with the organization of his Company, and is allowed an extension until the 30th of June for that purpose. He will make report to these Head Quarters, by courier, as soon as the Company is organized. IV Col McAlmont, Enrolling Officer of Pulaski County, will turn over to Lt. O'Connell fifty conscripts, to be attached to Capt [William] Hart's Company of Artillery. http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=9264&CISOBOX=1&OBJ=9396&ITEM=28
* June 30, 1862, Telegraph Nelson to Newton, Hart's three small pieces on the left at angles to strengthen my left so as to leave me more men to use on my right in case they attempt to flank me.
* July 5th 1862, Little Rock Genl. [Albert] Rust Des Arc, A fine company of Texas artillery men has just crossed the river here. They have good horses, No guns &c, are partly drilled. I can order this company across to Des Arc or Devals Bluff. to take Harts Battery and let Hart go back to Fort, taking the guns not in use. What do you think best as to that? I don't want to impede you in trying to help you. T.C. Hindman Maj. Genl. Comdg http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=10990&CISOBOX=1&OBJ=11175&ITEM=280
* July 5th [1862] Genl. A. [Albert] Rust, Des Arc, Genl [Thomas] Hindman knows nothing of Worthington. Suppose him to be a spy. I judge from your dispatches that you yet have Hart's four guns with you though you have sent his and Browns companies to Devals [DeVall's] Bluff. Let me know at once if Hart took the guns to Devals Bluff. I must send Pratt there to get them He will be of no use to you without the guns. Genl. Hindman's dispatch sent you just now says Pratt was ordered to Devals Bluff. This was written under the impression that you had sent the guns there. Let me know without delay where the guns are. Pratts present orders are to go to Des Arc. If you have sent the guns off I will change the destination so that he can get the guns, and then join you at once. R. [Robert] C. Newton A.A. Genl. http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=10993&CISOBOX=1&OBJ=11175&ITEM=286
*July 5th 1862 Genl. A. [Albert] Rust, Des Arc Where is Hart with guns? Has Brown gone to Devals [DeVall's] Bluff? We have here under Capt Pratt a full artillery company with splendid horse but without guns. If Harts four guns are at Des Arc I can send Pratt to you at once to man them, and let Hart return to Devals Bluff and take charge of his old Battery with both his own and Browns men. (Answer at once) R. [Robert] C. Newton A.A. Genl. http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=10995&CISOBOX=1&OBJ=11175&ITEM=290
* July 12th 1862, Head Quarters Army of the South West Little Rock Arks. Special Orders No 31 II Henry DePriest, Jno [John] Myers and Jno [John] Orr, privates in Capt [William] Hart's Co Artillery, are hereby detailed for special duty in Ordnance Dept at this place - they will report to Capt Polleys, Chf of Ordnance, for orders. By Command of Maj Gen [Thomas C.] Hindman. http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=9302&CISOBOX=1&OBJ=9396&ITEM=90
* July 17, 1862, General Orders No. 15, Army of the West, Priceville, I. It having been satisfactorily proven to a court of inquiry, convened for the purpose of investigating the conduct of certain men, formerly members of the artillery company know as Hart’s Battery, at the battle of Elkhorn, that those men were guilty of no misconduct on the battle-field, it is hereby ordered that they, viz, Charles E. Steele, M.M. Tice, W.D. More, John Kennedy, B.L. Allen , William Masterson, N.B. Milton, and James Pitkins, be, and they are hereby, relieved from the censure contained in General Orders, No. 10, dated Headquarters, Trans-Mississippi District, Van Buren, Ark, March 22, 1862 disbanding Hart’s Battery Light Artillery “for shameful conduct in the presence of the enemy.”
II. The court of inquiry of which Captain Guibor is president is hereby dissolved.
By order of Major-General Price: Thomas Snead, Assistant Adjutant-General.
*On July 21, 1862, Special Orders Army of the South West #40, ordered Major Rundell to assume command of a battalion of artillery composed of Woodruff's battery, Pratt's battery Daniels' battery and Hart's battery..... and set up camp of instruction
*July 21st 1862 Col. R. [Robert] G. Shaver, Pine Bluff, Let Maj. Johnson remain until he accomplishes the object of his mission. I will send Hart's Battery to you tomorrow. R. [Robert] C. Newton A.A. Genl. http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=11097&CISOBOX=1&OBJ=11175&ITEM=494
* Aug 1st 1862, Headquarters Army of the South West, Little Rock Arks, … Two men of Morgans Regiment of Arkansas Infantry [26th Arkansas Infantry] and two men of [William] Harts battery have suffered death today. - Their names were Amsick McCance and Michael Donahoo of Morgan’s Battalion and Thomas J and John Welch of Harts battery. - Their crime was desertion.
* August 1, 1862, Hart’s Battery was reconstituted at Camp White Sulphur Springs, Arkansas.
* Aug 2nd 1862, Head Quarters Army of the South West Little Rock Arks. Special Orders No 54 IX The following arrangement of the troops at Camp White Sulphur is announced: - First Brigade = Col R. [Robert] G. Shaver Comd'g - 1 [Charles L.] Dawsons' Regiment Arkansas Infantry 2 [Hiram S.] Grinsteads [Regiment Arkansas Infantry] 3 Portlock's Hart's Battery [Arkansas Infantry] http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=9354&CISOBOX=1&OBJ=9396&ITEM=171
* August 4, 1862, Special Orders Army of the South West #56
IX Capt [William] Hart, commanding Battery, will proceed at once to Pine Bluff, with his company and report to Brig Genl. Roane for duty. Genl Roane will detail the necessary number of men to fill Capt Hart's battery to One Hundred and twenty men. http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=9362&CISOBOX=1&OBJ=9396&ITEM=183
* August 5, 1862, :HQ TRANS-MISS DIST, Little Rock, Ark to General S. COOPER from Gen Hindman: “The arms brought out by Captain Hart, together with those brought by General Parsons, have relieved me of embarrassment and enabled me to make effective the greater part of my command.”
* Aug 7th 1862 Brig Genl Jno. [John] S. Roane I send you herewith a dispatch of today from Capt Brandenburg to Col [Benjamin F.] Danley. The force and object of the enemy must be ascertained as soon as possible, and the valley of the Arkansas protected, if it can be done. Send out as strong a cavalry detachment as possible you can immediately. - order Maj. Johnson and Lt. Col. Gidding's command to this side of the White river, and use them between the two rivers. - Take command of the troops and battery of Genl. [Mosby] Parsons, of Missouri, and let them take position at or near Red Fork, or lower down, if safe. - Hart battery left for Pine Bluff yesterday morning, and ought to reach you tomorrow, a heavy gun, to be mounted at shore, at Pine Bluff, left on Key West today. - T. [Thomas] C Hindman Maj Genl http://cdm.sos.mo.gov/cdm4/page_text.php?CISOROOT=/mack&CISOPTR=11118&CISOBOX=1&OBJ=11175&ITEM=536
* September 28, 1862, assigned to Colonel Robert R. Garland's brigade of Texas troops.
* January 11, 1863, surrendered at Arkansas Post.