Correction along with material from Ancestry.com:

Alford/Alfred Hickman, age 21, Private, Company K, 11th Regiment Missouri Cavalry, joined for duty and enrolled July 23, 1863 at Hartsville by W. P. McCarty for 3 years, absent on forage escort February 28, 1864, died in Regimental Hospital at Devalls Bluff, Ark of Malignent Typhus Fever July 13, 1864, description on enlistment, 21 year old Farmer, born in Wright County, Missouri 5’ 7”, fair complexion, blue eyes, light hair

M405: Compiled Service Records of Volunteer Union Soldiers Who Served in Organizations From the State of Missouri.

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Alfred Hickman in the U.S., Registers of Deaths of Volunteers, 1861-1865

Name: Alfred Hickman
Death Date: 13 Jul 1864
Death Place: Regimental Hospital
Enlistment State: Missouri
Rank: Private
Company: K
Regiment: 11 Mo Cav
Died July 13, 1862 in Regimental Hospital, Congest. Fever, reported by J. W. Slade, Regimental Surgeon

Source Information
Ancestry.com. U.S., Registers of Deaths of Volunteers, 1861-1865 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2012.
Original data:
Registers of Deaths of Volunteers, compiled 1861–1865. ARC ID: 656639. Records of the Adjutant General's Office, 1780's–1917. Record Group 94. National Archives at Washington, D.C.

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Alfred Hickman in the U.S. Veterans Gravesites, ca.1775-2006

Name: Alfred Hickman
Service Info.: PVT US ARMY CIVIL WAR
Death Date: 13 Jul 1864
Cemetery: Little Rock National Cemetery
Cemetery Address: 2523 Confederate Boulevard, Little Rock, AR
Originally buried Duvalls Bluff, Ark.
Replacement Headstone shipped May 20, 1942

Source Information
National Cemetery Administration. U.S. Veterans Gravesites, ca.1775-2006 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2006.
Original data: National Cemetery Administration. Nationwide Gravesite Locator.rate Boulevard Little Rock, AR 72206
Buried At: Section 10 Site 5166

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Alfred Hickman in the U.S. National Cemetery Interment Control Forms, 1928-1962
Name: Alfred Hickman
Death Date: 13 Jul 1864
Cemetery: Little Rock National Cemetery
Burial Location: Little Rock, Arkansas

Originally buried Duvalls Bluff, Ark.
Headstone shipped May 20, 1942

Source Information
Ancestry.com. U.S. National Cemetery Interment Control Forms, 1928-1962 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2012.
Original data:
Interment Control Forms, 1928–1962. Interment Control Forms, A1 2110-B. Records of the Office of the Quartermaster General, 1774–1985, Record Group 92. The National Archives at College Park, College Park, Maryland.

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His father Johathan Hickman, filed for and apparently received a pension, Application No, H 62,133 dated Oct. 7, 1890, Certificate No. 337,435, Missouri

Source Information
National Archives and Records Administration. U.S., Civil War Pension Index: General Index to Pension Files, 1861-1934 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2000.
Original data: General Index to Pension Files, 1861-1934. Washington, D.C.: National Archives and Records Administration. T288, 546 rolls.