The child that was born in 1891 was most likely Howard E. CHRISTOPHERSEN. In the 1900 census, he was a ward of William A. and Mary J. SEAMONS in Hyde Park, Cache, UT.
head, William A. SEAMONS, 32, b Nov 1867, md 13 yrs, UT England UT, farmer
wife, Mary J., 30, b Aug 1869, 1 child-living, UT DK DK
dau, Vinnie, 8, b Jun 1891, UT
ward, Howard E. CHRISTOPHERSEN, 9, b Feb 1891, UT DK UT
On 11 Jun 1913, Harvey married Grace WILLIS in Elko Co. NV. She was the d/o Merrill and Sarah (nee KAY) WILLIS.
On 5 Jun 1917, Howard registered for the WWI draft in/near Metropolis, Elko, NV. He said he was 26, born 1 Feb 1891 in Hyde Park, UT, was a farmer, was married and had 3 children. He was of medium build, slender with dark blue eyes and light brown hair. The index says his middle name was Edmund but when he signed the form a letter in his middle name appears to be dotted.
In the 1920 census, he was enumerated twice, both times in Elko Co. NV as CHRISTOPHERSON. The household included:
head, Howard E., 27, UT DK DK, laborer lead silver mine
wife, Grace, 23, NM UT UT
dau, Mabel, 6, NV
dau, Edna, 4-8/12, NV
son, Harvey W., 3-5/12, NV
son, Keith M., 7/12, UT
In 1930, Howard and Grace are in Los Angeles, Los Angeles, CA, with Edna and Harvey, plus Ruth 10 UT, Merrill 8 UT, Robert 7 UT, June 3-10/12 CA and Jackie 11/12 CA.
Harvey died 11 Jul 1980, probably in CA. He was buried 4 Aug 1980 in Murray City (UT) Cemetery. Grace died 15 Sep 1986 in CA. She and 3 of her sons, Keith, Merrill and Robert (born 1932), are in the CA Death Index.