James Sr - born abt 1818 in Ireland - listed birth location as Ballawena, Cty Antrim Ireland.Parents listed as Robert Cook and Henrietta Harvey.This is the same James who is listed as migrating in 1839 on previous data.
James Jr - born 1849 in CT died 1909, single.
Henrietta Harvey Cook - died May 1881 in CT.
All three are buried in Thompsonville CT.
So it appears that James and Ellen Cook are James Sr above and James Jr is their son, born in CT.
Still have not found a death for Ellen, wife and mother of James/James.
Massachusetts, Deaths, 1841-1915 004289812 Image 129 Name: James Cook Event: Death Event Date: 24 Aug 1900 Event Place: Longmeadow, Massachusetts Residence: Longm. Gender: Male Age: 81 Marital Status: Widowed Occupation: farm hand Birthplace: Ballawena, Antirm, Ireland Estimated Birth Year: 1819 Burial Place: Thompsonville, Ct. Father: Robert Father's Birthplace: Ireland Mother: Henrietta Harvey Mother's Birthplace: Ireland Volume/Page/Certificate Number: v 505 p 151 Film Number: 1843727 Frame Number: Digital Folder Number: 4289812 Image Number: 168
Massachusetts, Deaths, 1841-1915 004283153 Image 8 Name: James J Cook Titles & Terms: Event: Death Event Date: 01 Nov 1909 Event Place: Springfield,,Massachusetts Undertaker: John J Gleason Gender: Male Age: 60 Marital Status: Single Occupation: Blacksmith Birthplace: Thompsonville, Connecticut Burial Date: Nov 4, 1909 Burial Place: Thompsonville, CT Father: James Cook Father's Birthplace: Ireland Mother: Unk Mother's Birthplace: Ireland Volume/Page/Certificate Number: 416 Film Number: 2313605 Frame Number: Digital Folder Number: 4283153 Image Number: 00008
Connecticut Deaths and Burials, 1772-1934 Name: Henrietta Harvey Cook Gender: Female Burial Place: Thompsonville, Connecticut Death Date: 07 May 1881 Age: 93 Birth Date: 1788 Marital Status: Married Spouse's Name: Hugh Indexing Project (Batch) Number: B03753-6 System Origin: Connecticut-EASy Source Film Number: 3333 Reference Number: 148