More on Rigol from Infoplease:

• Rigol - Rigol A circle or diadem. (Italian, rigolo, a little wheel.) [Sleep] That from this golden rigol ...
• Rig - Rig A piece of fun, a practical joke. The Scotch say of a man who indulges in intoxication, ...
• William Shakespeare: Henry IV (Pt 2), Act IV, Scene V - Let there be no noise made, my gentle friends; Unless some dull and favourable hand Will whisper music to my weary spirit.
• Dictionary of Phrase and Fable: R - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "R"