Complex sentence: R.D.S. Tyler & Co. Burt was a member of the Masonic fraternity, participating as one of the founders and the first Master of the third Masonic lodge organized in Michigan.
Split into simpler sentences: R.D.S. Tyler & Co. Burt was a member of the Masonic fraternity. He was one of the founders and the first Master of the third Masonic lodge organized in Michigan.