The 1777 March of the Saratoga Convention Army

Is there a direct connection between the march of the Convention Army after the surrender at Saratoga October 17, 1777, and Framingham, Massachusetts?  Several secondary sources would lead one to believe that there is.  Only one primary source which I am aware of suggests there may be one, and its not the connection that others claim exists. Multiple authors have drawn a connection between the 1777 march of the Convention Army and Framingham by way of Brigadier-General John Nixon, who was born in Framingham.  They claim Nixon (whose Revolutionary War service is commemorated by the tablet pictured here, in Framingham's Edgell Grove Cemetery), escorted British Lieutenant-General John Burgoyne from Albany to Cambridge after the surrender.  Most prominent among these is a 1926 biography of Nixon by John M. Merriam, which indicates that he did, but provides no documentation to support it. [1]  A recent online biography of Nixon references a number of sources within ...