James Phipps was baptized 12 Dec 1813 in Heathfield, Sussex, the son of William Phipps and Elizabeth Potten. (I have an earlier query about this nephew James who joined the Navy.)
I have found three sons for William and Elizabeth, baptized in Heathfield. I have been working on the second son John's family (b. 1816) but no success with William (b. 1819).
At some point the family moved to London, and in 1841 William and Elizabeth Phipps are living in Chelsea.
In 1861 I found the two older sons, John and James, living next door to each other in Hampstead. James is with wife Sarah and three or four stepchildren, surname Anderson. I found his marriage to Sarah on Ancestry, 1858, she was born Sarah Ann Turner. She was a widow, James a widower.
I cannot find James on the 1841 or 1851 censuses. Could not find a marriage on Ancestry or FamilySearch. I can't find him in British military records.
Sarah is widowed by 1871. There is a possible death in Hampstead in 1870 for James, age is 50, should be 56, but might be a transcription error with the 6 looking like a zero.
I've checked newspapers for his death and also the probate index, nothing found.
I can't think of any other ways to find him, but maybe I've missed something. Any help appreciated!