Similar restrictions were made applicable to artificers and workmen. There are many works about merchants, shopkeepers, workmen, and noblemen groups. The temples were built by guilds of architects, artisans and workmen. Workmen Compensation Insurance covers employees under Workmen Compensation Act, Fatal Accident Act and common law. Archaeologists have found four rulers used by the workmen who built the ship. Below them were the workmen and slaves. One of the group, a trained carpenter, was subsequently enrolled as one of the workmen. There were 70 workmen employed, together with an office staff of 30. In historic logging operations workmen sometimes used an ark as mobile dwellings. When he became a foreman he expected more output from the workmen. The KOL primarily consisted of previously unorganized semi-skilled workmen and machine operators. Secrets were maintained, as most of the workmen who built the tomb were killed. The catch was that Whitney's guns were costly and handmade by skilled workmen. On the sides were workshops for the coopers and other workmen. He also systematized aqueduct maintenance with gangs of specially trained workmen.