I clearly need to let my facial hair grow out, and find some wax. Even today's overwrought hipsters have nothing on these Universalists of yore.
Details here, in a 1896 book about the Ocean State's leading men. Search for "Universalist" to find other laymen, though none has a moustache as profound as Thayer. Woonsocket homeopath Robert G. Reed comes close.
Installed at the All Souls Universalist church in Worcester, Mass. in 1889; details here.
His bio, here, left column.