In the 1900 US Census for District 36, Moro, Sherman County, Oregon the family of Elvin Barnum was enumerated as follows:
Dwelling #177; Family #180
Barnum, Elvin E.; Head; W; M; b. Aug 1874; 25; Married 3 years; b. Oregon; Father b. New York; Mother b. Oregon; Farmer; Can read, write and speak English; Owns farm home with mortgage; Farm Schedule 56
Barnum, Mary E.; Wife; W; F; b. May 1879; 21; Married 3 years; Mother of 2 children; 2 children living; b. Idaho; Both parents b. Virginia; Can read, write and speak English
Barnum, Lena A.; Daughter; W; F; b. Apr 1900; 1/12; Single; b. Oregon; Father b. Oregon; Mother b. Idaho
Barnum, Arline M.; Daughter; W; F; b. Aug 1898; 1; Single; b. Oregon; Father b. Oregon; Mother b. Idaho; Can speak English
In the Wasco and Sherman County Directory 1898, Published by Portland Directory Company, Portland, Oregon appeared the following listings for the town of Moro: Barnum, A.H., farmer; Barnum Bros., 160 acres, $715, farmers; Barnum, Elvin E., farmer; Barnum, L., farmer.
More information about Elvin may be found in the Division of Special Collections and University Archives, University of Oregon Libraries. Title: W.P.A. Oregon Historical Records Survey Records; Collection number: Bx 66. Barnum, Elvin Earnest, Sherman County, Merchant, General History, Box #32, Folder #30, File XI.