Well - that kept me busy for a few days!! ;
Thank you so much to all of you.
Haven't quite finished all the cross-checking but nearly ....
The 1870 Census family definitely ties in to my Geo Ponder Magrath & Mary Scott - a whole host of children who just do not appear in the Irish records that exist.
A few incognitos, don't know if you are able to clarify??:
1. Catherine Magrath b1859 Ireland who married Burt Somers is a very likely candidate for a sibling. I can find a Burt Somers in Lincoln New Mexico 1900, who was b1864 Maine, widowed - but nothing else to firm up suspicions of family link.
2. In the 1905 Bronx Census Catherine Burke Magrath is with her one surviving child Margaret Magrath Terry & gdgtr Pearl Terry & 2 gchildren surnames Shields. So whose children were the Shields they I wonder
3. Thanks so much for the Springdale, Ct Cemetary link - this gave a list of burials in which I found previously unknown husband of Marian Magrath Walker, Dr JK Walker - the probable link for Marian & Wm B's burial there
4. Charles V Magrath has been a mystery. Some time ago I did find a ref to a Charles V, carpenter in Fairfield Connecticut in 1920 which seemed unlikely as he was always a Clerk and would have been 80. But now your amazing finds have produced Hamilton Thomas's gson Robert Hamilton Magrath as dying in 1992 in Fairfield, CT - so I wonder if there is any evidence around for our Chas V Magrath, born about 1841 Dublin, Ireland living/dying in the area?
Many thanks