It may be the oldest ballad on the Battle of Bosworth Field, and as old as 1485, but the earliest manuscript is from the mid-seventeenth century.
A boar wrought havoc in the garden, but an eagle bore a rose away to safety.
The Earl of Richmond - as Henry VII was then known - won Shrewsbury with the aid of letters from Sir William Stanley.
The eagle fought, with the aid of the talbot, the unicorn, and the hart's head, and won, making the garden fresh and green again.
The boar can represent either the House of York (whose Edward IV deposed the House of Lancaster) or specifically Richard III of England (whose symbol was the white boar), who endangered the future Henry VII of England's life, causing his uncle Jasper Tudor to flee the country with him - or represents both.