Henry Ernest Dudeney/Puzzles and Curious Problems/39 - Surprising Relationship

by : $39$

 * Surprising Relationship
 * : "You say that Mr. Tomkins is your uncle?"
 * : "Yes, and I am his uncle!"
 * : Then -- let me see -- you must be nephew to each other, of course! Funny, isn't it?"


 * Can you say quite simply how this might be, without any breach of the marriage law or disregard of the Table of Affinity?