Boiled Ham for 200 Persons

Two 12 or 14 pound hams should be plenty to serve 200 persons. The ham will eat to best advantage if cooked in the following way:
Cleanse the ham, place in large boilers, cover with cold water, heat gradually to boiling point and cook slowly forty-five minutes. Place in fireless cooker overnight, allowing 17 to 18 hours, and cool in water in which it was cooked.