Historical clue formulations

• Some rope sources — 2014-12-27
• Rope and dope sources — 2014-03-15
• Rope fibers — 2008-01-23
• Plants used for fiber and food — 2007-02-15
• Rope fibers — 2001-08-13
• Rope materials — 1994-09-25
• Sisal and Bombay, e.g. — 1994-03-17
• Cannabis plants — 1994-02-13