I was watching the show called "AMERICAN RIDE." Ride with America's history teacher, Stan Ellsworth.
I must have had a brain fart, because he talked about this very fact & that it took almost about either 6 months or one year almost to get the cannon from Fort Ticonderoga and transported to Boston. (Just this quote does not do service to how well Stan Ellsworth covered this event, for what it's worth.)
I can't remember how long it took, but I seem to recall that the snowy conditions helped, allowing sleds to be used to drag the stuff.
I believe that the troops arranged to fill wagons with earth and moved them into position on the Dorchester heights overlooking Boston during a single night. The enemy awoke to find himself surrounded by guns which would be able to sink the warships in the harbor.
A deal was struck for the occupying forces to leave Boston unopposed in return for not burning the city. I don't think a shot was fired.
I wonder if this was a good deal really. The property owners in Boston probably thought so. One can't help but wonder what the war would have been like otherwise since I believe the troops allowed to leave by ship were probably among those which later arrived by ship to eject Washington's troops from New York.