Dear Mr. Walker, I'm afraid my ability to concentrate on genealogy has been limited as of late, and it is only the recent occasion of my father's passing at age 89 that has re-opened the Perrin files. I was glad to see that you had found the resting places of Louis and Augusta.
Interestingly I have found the name Louis, Lewis, and Lems attached to this man and am not quite sure which is correct. I've also found Augusta Gertrude's name listed as Gertrude Augusta. I'd be interested in seeing photos of the gravesites if you happen to have them.
There is an on-line version of the Boyd history of Conesus at http://cdl.library.cornell.edu/cgi-bin/moa/sgml/moa-idx?notisid=ANY7469http://cdl.library.cornell.edu/cgi-bin/moa/sgml/moa-idx?notisid=ANY7469 - subtitled "from its first settlement in 1793 to 1887 published in 1887. Here the name is "Lewis married to Gerturde McEntee". One of these days I hope to go through its 176 pages for more names.
I also have some information on his brothers Andrew Norton and William Loomis Perrin as well as the pedigree if you are interested.