Done to a turn

I am trying to find the origin of the phrase "done to a turn" Any ideas?

Thanks

A guess -- meat cooked on a rotating spit?

This may have been used in colonial times by Pilgrims using a reflector oven....not sure

The Oxford English Dictionary says "orig. in reference to the turns of the spit." It has two quotations to illustrate "done to a turn"; they're dated 1780 and 1864. That would be too late for the Pilgrims (and I hadn't known they had reflector ovens).

This would have been probably the 1700's. The historic house I work in has three time periods.