No better epigram could be put in reply than simply putting the Spade Guinea beside the Spade.
"A Miscellany of Men" by G. K. Chesterton
He is, I believe, the only man left in the North Country who can show you a hundred spade guineas.
"Put Yourself in His Place" by Charles Reade
As I told you before, I expected spade-guineas.
"A harum-scarum schoolgirl" by Angela Brazil
Reckless Amaryllis cared not a pin for all the spade guineas in the iron box.
"Amaryllis at the Fair" by Richard Jefferies
His dress was plain and rather the worse for wear; but round his neck a bright spade guinea was hung by a silken string.
"Yellow-Cap and Other Fairy-Stories For Children" by Julian Hawthorne