Have you collected the family death notices for John Gagel? I've indexed them in the collection "Milwaukee's German Newspapers; an index of death notices and related items". It covers 1844-1950. There are also multiple entries for a Charles Gagel who may've died in an accident of some sort.
There are also several Dorn and Dohrn entries found in the index.
Contact me for the full entry from my index or more information.
gary.rebholz@gmail.com