After a few days research in McHenry County during a road trip this month the line of David through Frank E was verified with marriage license and birth certificate. Several photos were taken of gravesites as well.
This line continues beyond your census research through an offspring of Frank E after the 1930 census and other siblings. The line went from IL to WI to CA.
Also, you may be interested to note that Clarence Ritter who married Gertrude FAY is buried at the Ringwood Cemetery in Ringwood, IL. I have a photo of the gravemarker. Gertrude married again to a McNaughton but is buried near her brother Frank and next to Clarence; Gertrude lived past 100 and a living descenant has her obit.
Also, sister Margaret E FAY who married William N Merwin is buried next to Frank and Gertrude.
Not to end there, so too is buried Jennie Fay Spaulding, who married Elmer Fay, at the Ringwood Cemetery. She is buried with her last husband, a Spaulding, and with her parents: Simmons.
Curious enough is missing the grave markers for Mary Carr, mother of Frank E Fay, and Elmer Fay listed or found in McHenry County.
There are several lines of FAY to research in the area.
An attempt was made to find the gravesite of Jerome FAY, father of Frank G, but all that was ascertained was the name of the graveyard: Greenwood Cemetery (Greenwood IL). We tried to find the marker there but was unsuccessful. We do have digitals of the markers for George, Lucinda, Ellen and Frank G. They are all buried at Alden Cemetery, Alden, IL as you know from the index.
I ran across your letter in the files at the McHenry Historical Society in Union, IL and the answer dated August 9, 2007. I can add to the answer you received detail on the probate for Jerome G Fay should you want to write the county for probate records. Jerome G Gen. No. 6962 Proceeding: Extr Date of Death: Feby 10, 1918 Petition Filed: Apr 13, 1918 References: 244/334
I am waiting on the probate record of Frank E.
Your webpages were useful to determine this line. Might I mention an error made in your narrative for Elmer Fay of the census of 1850? In the narration you write an "Elenor; 8" son of David which should be Elmer; later on the same page you continue with Elmer (link) so I know you mean to write Elmer. Alvin in 1880 was a Lawyer, Kernville, Kern Co, IL.
I would appreciate your source for the death of Lucretia FARR who died in WI. I would like to continue looking at this generation.
I have you to thank for showing me two separate lines for Frank E and Frank G...which is confirmed by my finding two gravemarkers in two different cemeteries.