The Ottumwa Tri Weekly Courier of 16 Sep 1911 provides the following obituary:
Samuel V, Sampson was born in County Cornwall, England, March 17, 1839, and came to the United States in 1849, settling in Pennsylvania. After a few years there the family moved to Maryland, where they resided until 1855.
From there they moved to Jefferson County, Iowa. Mr Sampson enlisted in the army in 1861 (He enlisted as a 22 yr. old resident of Fairfield, Jefferson Co., Iowa on June 24,1861 in Co. H, 5th Iowa Infantry. Listed as in the hospital at Jackson, Tn. since Sept.16,1862 on Co. return dated Sept.30,1862. Listed in the hospital at Keokuk, Iowa since July 18,1863 on Co. return dated Jan.31,1864. Mustered out and discharged at Chattanooga, Tn. on July 30,1864.) and served three years in Company H of the Fifth Iowa Volunteer Infantry. He went through the siege of Vicksburg and was with Sherman at Atlanta. On his return from the army he taught school and  was county superintendent of Jefferson County.
In 1867 he was united in marriage to Miss Susan Stoner of Fairfield, Iowa. Mr Sampson taught school at Ashland, Chillicothe and Ottumwa. He had the distinction of being the first instructor in the school for African Americans in Ottumwa. Since coming to Wapello County, his residence has been continuous. He engaged in business in Agency in 1886.For eighteen years the deceased was superintendent of the Methodist Sunday School of which he was a faithful, devoted and efficient member.
Brother Sampson passed away, Friday, September 8, leaving to mourn his loss a devoted companion, four brothers and one sister, they are:
W.K. Sampson of Valisca, Iowa, Thomas Sampson of Ottumwa, Iowa, G.G. Sampson of Stuttgart, Arkansas, J.W. Sampson of  Weldon, Iowa, and Mrs J.G. Symons of Fairfield, Iowa.
The deceased united with the Methodist Church when he was fourteen years old, and was a true and faithful member all those years.
He was commander of the Winslow post of the G.A.R., and a charter member of M.W. of A. of Ottumwa.
Funeral services were held in the Agency M. E. Church Monday afternoon at 2:30 o’clock. The services were in charge of Rev. B.G. Hankins, assisted by Rev. J.C. Kendrick of Ottumwa and the Rev. C.S. Cooper of Agency. Both the old soldiers and the pupils of the public school attended the services, which showed the esteem and high regard for so good and worthy a man. Interment in Agency Cemetery. (Contributed).
He filed for an invalid pension on March 22,1897 and received certificate # 952.024. In 1900 he was living in Agency, Iowa working as a druggist. Gravestone Records of Wapello County, Iowa, Page 188 lists Samuel V. Sampson as died on Sept.9,1911 at age 72. His widow filed for a widow’s pension on Oct.23,1911 and received certificate # 745.423.  (Source: https://www.findagrave.com/memorial/113876789)