I came across the headstone of Dorothy (Monfort) Losee at the Memorial Cemetery of St. John's Church located on Route 25A Laurel Hollow, NY. The stone is located in a plot with others of the same time period, which all predate the cemetery. This cemetery has several plots of stones that were removed from other, now defunct, cemeteries in the area and I suspect that's what happened with this stone. There are other Monforts but no stone for Jeffrey Losee.
In memory of Dorothy Monfort, wife of Jeffry Losee died March 16, 1837 aged 40 yrs 5 mos & 21 d's