It was easy to find his gravestones, and I'm happy to report that they have received some much needed care since my last visit in 2011. They're in great shape.
A pair of Lorain Journal articles below, part of a series written by Wallace White, provide a detailed history of two surveys that included the Firelands in which Almon Ruggles participated. The first article tells how an uncalibrated chain likely led to an error during the 1806 Pease survey; the second article tells how they had to resurvey the area (in less-than-pleasant conditions) in 1808 with impressively accurate results.