Served as Sergeant with Co. G of the 28th IA Infantry during the Civil War per list of veteran burials in Nebraska.

Attended Queen Victoria's Wedding
The following dispatch from Lincoln is in reference to Henry Masterman, well known in Seward and who is the father of Mrs. Joseph P. Gannon of this city:
"Chaplain Henry Masterman of the Lincoln Grand Army received an invitation today to become a member of the Victoria Diamond Jubilee association, which has been organized in Omaha for the endowment of eleemosynary (charitable) institutions. Chaplain Masterman is probably the only man in America today who attended the wedding of Queen Victoria as a guard of honor. He was lance corporal of the Sharpshooter regiment, Second battalion, Rifle brigade, commanded by Colonel Sir George Brown. Chaplain Masterman was the youngest man in the regiment, just as he was the oldest in the 28th Iowa Volunteers during the Civil War. He remembers the event and speaks of the day as one of the hottest he ever experienced. For five hours the regiment stood in the broiling sun. The troops were reviewed by the queen and Prince Albert after the wedding. Chaplain Masterman is now 84 years of age, but is heartier than many men of 70. Chaplain Masterman is an Englishman by birth but has lived in America for nearly half a century. He served throughout the war of the rebellion, his oldest son being in the same regiment. He is an enthusiastic Grand Army man and has for years been chaplain of the local post.
Seward Weekly Register, Seward, NE, Thurs, June 24, 1897

Henry Masterman, the aged father of Mrs. Joseph Gannon of Seward, Nebr., died at his home in Lincoln last Thursday after a short illness. He was 90 years and 20 days of age, and for 25 years had served as chaplain of Farragut Post, G.A.R. of Lincoln. During that time he assisted at the burial of 181 old soldiers. Of his eventful life the Lincoln News says:
"Deceased had enjoyed a career that entitles him to no little distinction. He was born in Yorkshire, England, in 1813, and at the age of eighteen enlisted in the British army, in which he served for seven years, during which time he traveled practically all over the world. While in the service he was one of the guards of honor at coronation, and again at the wedding of the late Queen Victoria. It was while he was in the service he met at Halifax, Nova Scotia, Susan Pike, who became his wife and who died but a little over two years ago in this city. After seven and a half years of service he bought his discharge and was for several years employed as a lackey in London, but finally reentered the government service, going to Bermuda as an officer in the convict service. He remained in the West Indies for about four and a half years, and upon retiring he came to the United States, taking up his residence in New York state in about the year 1850. Several years later he removed to Iowa, where he lived when the war broke out. In 1862 he entered the union army as a member of the 28th Iowa Regiment and served until August 1865. He participated in many battles of the rebellion, and while never wounded further than being struck by a spent ball, he had many narrow escapes. He went in as a private, and was promoted to the position of second sergeant.
"It was in 1871 that Mr. Masterman came from Iowa to Nebraska and took up a homestead in York county. Three years later he came to Lincoln and secured employment as a guard at the penetiary, a position which he had for seven years."
Seward Independent Democrat, Seward, NE, Thurs, April 30, 1903
Provided by contributor Kathy Monical