The following 1930 census record appears to be that of Francis J. Daves, son of Francis John Daves, and is confirmed by the fact that his uncle John W. Daves refers to Frank being in Valentine NE in one of his famiy letters.
1930 - Valentine, Cherry County, NE
Frank J. Daves, age 31, born in Colorado, both parents born in Illinois, first married at age 18, occupation: dealer, implements
Elsie Daves, wife, age 31, born in Iowa, father born in IL, mother born in IA
There are no children enumerated with this couple