J. Calvin Robins, Private, Company C, Turnbull’s Battalion, McNair’s Brigade, Arkansas Infantry,* enlisted February 22, 1862 at St. Charles, Ark., by Capt. Gibson for 1 year, detached for artillery service in Humphrey’s Battery November 17, 1862

* This company subsequently became Company K, 25th Arkansas Infantry,

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J. C. [James], Bobins, Private, Captain Rivers’ Battery, Arkansas Light Artillery [1st Regiment Arkansas Battery],
detailed from Infantry, McNairs Brigade, November 18, 1862, March/April, 1864, captured at Atlanta, Ga. September 3, 1864, forwarded to Louisville, Ky., October 27, transferred to Camp Douglas, Ill. October 29, applied for oath of allegiance to the US, November __, 1864, “Claims to have been loyal. Enlisted to avoid Conscription. Deserted to avail himself of the Amnesty Proclamation,” transferred March 29, 1865, enlisted in 1” Co. 5th US Vols., enlisted in the 6th U. S. Vols. April 1, 1865, no further records

M317: Compiled Service Records of Confederate Soldiers Who Served in Organizations from the State of Arkansas

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You can procure his records through a service provided by these message boards at:

http://history-sites.com/research/

I could not locate a pension file nor a Federal service record