No investigation of a New England family, such as Robert Williams, would be complete without looking up the name in James Savage's Genealogical Dictionary of New England. Savage's books, in four volumes, can be purchased on CD and is easier to search. However, Savage, like many frugal New Englander people wanted to save paper and made up his own way to abbreviate words. Most of them are found in the beginning of Volume One, thank heavens.
At fist glance, his work looks like an endless stream or a big run-on sentence punctuated by surnames then forenames It seems to me that it might look like the text-speak or text messaging used by today's techno-culture!
Robert, of Roxbury and his two sons Isaac and Samuel are listed so I have a lot to read and glean information from!