I am a former resident of Cortland County and wrote a History of Taylor (Cortland County) in 1977 after many years of extensive research of the town. In my collection, I have the obituary of Charles Cotanche, 1994, which states he was buried in Union Valley Cemetery in the town of Taylor, Cortland County. I moved to Florida the next year and do not have a copy of Laura's obituary, but would suspect that she was also buried in Union Valley.
However, I notice that he is listed under Cortland Rural Cemetery on www.findagrave.com
, but his obituary from the Cortland Standard clearly states Union Valley. His funeral was at Perkins Funeral Home in Dryden, but Laura's is not listed in their 2005 archive. Sorry I could not help further.