In an article that was a precursor to John R. Rollins' book (NEHGR 1853)he listed these men as his sources for information:
Hon. John Wentworth
Reverend A. H. Quint
T. B. Wyman
H. G. Somersby Esq.
My goal will be to check what these men wrote, check the dates they published and compare it to John's dates of publication. What were their sources? Quint if I remember right cited John R. in his publication but I'll make sure.
Libbie's dictionary, published after his death by Sybil Noyes, casts doubt on Thomas being James Rollins child.