His great-great-great-granddaughter, the artist Harriet Russell, carried on the trick, sending herself and friends 130 letters from Glasgow with addresses hidden in recipes, hand-drawn cartoons, a color-blindness test, an eye chart, and connect the dots puzzles. One letter required postal workers to solve a crossword; another puzzle was delivered to the correct address with the message “Solved by the Glasgow Mail Centre.” One hundred twenty out of the 130 letters she sent arrived safely.
