The March 1993 issue of Games magazine "Pencilwise Extra" presented the following puzzle by Will Shortz. Cover one letter with a penny, then take the other six letters on the two lines intersecting at the point and anagram them into a word. For example, cover 15 and anagram 3+7+11+13+14+16. Shortz informs me that this puzzle was invented by Jules Roth and examples published in Tip-Top puzzle magazines in the 1960s.
Word Ways: Vol. 26
, Article 10.
Available at: http://digitalcommons.butler.edu/wordways/vol26/iss2/10