I found the obituary of Simon R. Ronk, died 1997, Newburgh, NY, on this forum and it was noted that there were no family survivors. However, Hilda's Blackett nephew survives. Obviously, there was little family contact or someone would have known family relations. There also is a family story that the Blackett family Bible was in Hilda's possession. Is it possible the Blackett Bible is out there somewhere?