I found my reprint of Morse yesterday and decided to see what I could figure out...
I tried searching for Capt John in the passenger records on Ancestry, but there were just too many variables, and too many Johns to be able to sort them out with any confidence.
Since Capt John married Sarah Busby Cakebread, widow of Capt Thomas, and Capt John and his first wife Mary purchased land from Capt Thomas, perhaps Capt Thomas and Sarah were known by the Grouts in England as well, and came over either on the same ship or about the same time as the Grouts. So I searched for them...and found a Thomas Cakebread who arrived in 1634, but then found BOTH Thomas and Sarah Cakebread arriving in 1630, in this book:
BANKS, CHARLES EDWARD. The Winthrop Fleet of 1630: an Account of the Vessels, the Voyage, the Passengers and Their English Homes, from Original Authorities. Boston: Houghton Mifflin, 1930. 119p. Reprinted by Genealogical Publishing Co., Baltimore, 1961. Repr. 1983. Annotation: Over 700 names given, with list of 40 heads of families on the Mary and John, which sailed with the Winthrop Fleet. See also no. 0388, Bartlett; no. 3323, Hunt; no. 4477, Kuhns; and no. 6600, "Passengers of the Mary and John, 1634."
More as I pursue this, hopefully we will find something useful!!
Lynne