The term rebus has, during the past century, been applied to several different types of word puzzles. This multipart article examines the varieties of the letter rebus, a puzzle form which has been extensively featured in the pages of the Enigma, the official publication of the National Puzzlers' League, during the past sixty years. In fact, counting such varieties as the suber (or reversed rebus) and the rebus alternade, a hybrid puzzle combining the basic rebus with a puzzle taking each nth letter from a word, there have been more than 5500 such puzzles published.
Eckler, A. Ross
"The Letter Rebus (Part 1),"
Word Ways: Vol. 17
, Article 2.
Available at: http://digitalcommons.butler.edu/wordways/vol17/iss1/2