On three Knights without spurs

Sir Iohn in's spurs no rowels had, because
There was no need, his horse twice roweld was:
Sir George but one spur wore, for if one side
Will go, to'ther wil follow he reply'd:
I askt Sir Lancelot why no spurs he wore?
Because saies he, a free horse needs no spur.
If spurs shew Knights and Horsemen; then I fear
'Mongst them was neither Knight or Chivalier.