Most of the simple people lived in villages of about 20 homes circling a village green or lining a single winding lane. There were only first names, and these were usually passed down family lines. To grind their grain, the villagers used hand mills with crank and gear, or a communal mill, usually built of oak, driven by power transmitted through a solid oak shaft, banded with iron as reinforcement, to internal gear wheels of elm. Almost every village had a watermill. It might be run by water shooting over or flowing under the wheel. Clothing for men and women was made from coarse wool, silk, and linen and was usually brown in color. Only the wealthy could afford to wear linen or silk. Men also wore leather clothing, such as neckpieces, breeches, ankle leathers, shoes, and boots. Boots were worn when fighting. They carried knives or axes under metal belts. They could carry items by tying leather pouches onto their belts with their drawstrings. They wore leather gloves for warmth and for heavy working with their hands. People were as tall, strong and healthy as in the late 1900s, not having yet endured the later malnourishment and overcrowding that was its worst in the 1700s and 1800s. Their teeth were very healthy. Most adults died in their 40s, after becoming arthritic from hard labor. People in their 50s were deemed venerable. Boys of twelve were considered old enough to swear an oath of allegiance to the king. Girls married in their early teens, often to men significantly older.