"'Dear Sir:--I understand you have quite a collection of mud turtles. Would you be willing to part with them? I mean for a consideration, of course. If you would kindly communicate with me. I will pay you a good price for all the turtles you have. But I must make this stipulation, which, at first may seem odd to you. But I have a reason for it. I can not meet you personally. If you are willing to sell your turtles will you write a note to that effect, and leave it in the dead sycamore tree on the edge of Oak Swamp? That is the only way in which you can communicate with me. Kindly let me hear from you soon.'"