This bill, being payable to his own order, A sold in Edinburgh at par; and with its contents purchased bills upon London, payable at sight to the order of B, to whom he sent them by the post.

这张汇票，根据他自己的订单支付，A 在爱丁堡按面值出售；并连同其内容在伦敦购买的汇票，即期付款给 B 的订单，他通过邮寄将它们寄给了 B。