Paula instructed Alvin, her agent, to purchase a quantity of hides. Alvin ordered the hides from Ted in his own (Alvin’s) name and delivered the hides to Paula. Ted, learning later that Paula was the...

Paula instructed Alvin, her agent, to purchase a quantity of hides. Alvin ordered the hides from Ted in his own (Alvin’s) name and delivered the hides to Paula. Ted, learning later that Paula was the principal, sends the bill to Paula, who refuses to pay Ted. Ted sues Paula and Alvin. What are Ted’s rights against Paula and Alvin?