Ah...This slipped through the cracks.Thanks for the reply.Sorry for the delay.
I've been researching Martha & her sisters for several years now and have found out some of what I was seeking back in my initial post.
I now have obits for Martha, her 2 Wickham step-sons Edgar & Harold, and an obit for James Emmett's first wife Nina as well as burial locations for all of them although I've not yet created memorials for Martha & stepson Harold at Find A Grave.Ex wife Nina and son Edgar Wickham already have FaG memorials.
1940 census - as mentioned in the post, I have James Emmett & Martha as husband & wife on the 1940 census living in the house that Martha & 1st husband Theodore Mark Howe had purchased in 1918.
And as also mentioned, the latest mention for James Emmett & Martha I'd found back when I'd posted was for 3 Jun 1954, Port Jervis in the NY Deeds/Grantor-Grantee database on Family Search.
I now have Martha's DOD - 14 Dec 1970 Port Jervis, her obit and her burial location - Laurel Grove Cemetery, Port Jervis.
I also have James Emmett's DOD - 10 Apr 1983 and burial location - with Martha in Laurel Grove.I suspect that his place of death would have been Port Jervis since that's where the house he owned with Martha was located.
What I still seek are a marriage date/year for Martha & James Emmett and an obituary for James Emmett Wickham.