More than half of the delegates had trained as lawyers (several had even been judges), although only about a quarter had practiced law as their principal means of business. Others were merchants, manufacturers, shippers, land speculators, bankers or financiers. Several were physicians or small farmers, and one was a minister. Of the 25 who owned slaves, 16 depended on slave labor to run the plantations or other businesses that formed the mainstay of their income. Most of the delegates were landowners with substantial holdings, and most, except for Roger Sherman and William Few, were very comfortably wealthy. George Washington and Robert Morris were among the wealthiest men in the entire country.