- Railway Puzzle, 134.
- Railway The Tube, 149, 243.
- Railways, The Chinese, 127, 224.
- Ramsgate Sands, On the, 147, 242.
- Rat-catcher's Riddle, The, 56.
- Ravensdene Park, Mystery of, 105, 211.
- Reve's Puzzle, The, 24, 163.
- Ribbon Problem, The, 130, 228.
- Riddles, old, 16.
- Riddlewell, The Merry Monks of, 68, 194.
- River Crossing Problems, 82, 83.
- Robinson Crusoe's Table, 142, 240.
- Romeo and Juliet, 114, 217.
- Romeo's Second Journey, 116, 218.
- Rook's Path, The, 207.
- Rope, The Mysterious, 79, 201.
- Round Table, The, 137, 236.
- Route Problems, Unicursal and. See Unicursal.
- Sack Wine, The Riddle of the, 72, 196.
- St. Edmondsbury, The Riddle of, 75, 197.
- Sands, On the Ramsgate, 147, 242.
- Sea-Serpent, The Skipper and the, 150, 244.
- Shield, Squares on a, 27.