Here are the last of my aids for remembering the colours of the rainbow:
Red Orange Yellow Green Blue Indigo Violet
Ratepayers, Owing Yearly Gas-Bills, Invariably Vacate
Reflecting Overhanging Yews, Gravestones Blacken, Infuriating Vergers
"Revenge!" Othello Yells, Goaded By Iago's Villainy
Romeo Overleaps Young Girl's Balcony In Verona
Ragged, Orphaned Youngsters Generated Barnardo's Institutional Vision
Rewound,Oscillating Yo-yos Gradually Build Incredible Velocity
Rich Oxford Yahoo Graduates- BA In Vacuity !
Revolving Observatories Yield Great Benefits, Improving Visibility
Rigorously Overhaul Your Guest-rooms: Bedbugs Irritate Visitors
Rotting On Yonder Gallows, Body-parts Imperceptibly Vanish
Retrospective Overdrafts Yield Greatly Beneficial Interest Values
Romanians Order Yeasty Garlic Baguettes, Immobilising Vampires
Racks Open Yawning Gaps Between Individual Vertebrae
Resolutions, Offered Yearly, Get Broken In Vanloads!
And lastly,my only ever DOUBLE mnemonic...
Released Only Yesterday,Gaol-bird Burgles Indigent Veterans---
Reoffending On Your Grandparents Betokens Incredible Villainy!
I am so busy now with my website that I fear I may not add to this collection!