The Eaton County Genealogical Society has compiled booklets of cemetery transcriptions, and I have two, those being for Walton Twp. and Kalamo Twp.
There is a George W. Bartlett in Olivet Cemetery, Section B-1. no birth date, but his date of death was 12 Dec 1852, with note "7Y 1M 12D, Son of Rev LN & Emily.
Also...Bartlett Horace M, again no birth date, but her date of death was 11 Oct 1855, with note "4Y 6M, also son of Rev LN & Emily."
From the rough-sketch cemetery map, there appears to be three entry ways from Shiperd street or road.The left most entryway would curve in the back and come back around and exit through the most right entryway.Then the center entryway is right up the middle meeting the curve in the back.Section B-1 is between the left and the center entryways.