John E. stillwell, in Historical and Genealogical Miscellany vol. III, pg. 22.
by Sitherwood, in Throckmorton Family History pg 55.
b. 163- d unmarried 1669. Jamacia p. 376 Nov. 6, 1669, N>J> John throckmorton Jr. gave a power of attorney at this date to his father, John Throckmorton Sr. of Providence, RI and called himself lawful heir of his late deceased brother, Freegift.