From The Story of Dartmouth, by John P. Martin:

More local activity is inferred from a Halifax newspaper of January 1753 which informs us that Mr. G. Gerrish, blacksmith, has finished a crank for a new sawmill erecting at Dartmouth, which weighs nearly 17 cwt. The mill to go by wind and to carry 18 saws.

“A crank for the new saw-mill erecting at Dartmouth”