More info concerning the daughter:
Found an Obituary for Glenn Lange (husband to the daughter of Francis Kirby: Frances Mae Kirby https://www.wikitree.com/wiki/Kirby-233 )
Glenn was born Feb. 27, 1936, in rural Delaware County, Iowa, to Louis and Bernita (Hutton) Lange. He was united in marriage to Frances Mae Kirby on March 5, 1957, in Anamosa. She passed away in 1974. Read more at http://www.thegazette.com/obituaries/glenn-lange-20160527-0000018801-01#SvGWb8U1uhKYqKvM.99
Found Find a grave memorial for the daugher: Frances Mae (Kirby) Lange
https://www.findagrave.com/memorial/84626316
Frances Mae Kirby Lange
Obituary write up is here:
https://www.findagrave.com/memorial/84626316#view-photo=55370360
(no information for the father Francis Kirby though.)
1940 US Census Report
https://www.familysearch.org/ark:/61903/1:1:KMTW-6Y8
Father: Francis Kirby born 1908 Age 32
Mother: Artazuna Kirby born 1907 Age 33
https://www.familysearch.org/ark:/61903/1:1:KMTW-6YN
Daughter Francis Kirby 1936 Age 4