After John Bradmore removed the arrowhead from Henry V's skull in 1412 he was given an annual annuity of 10 Sovereigns a year. How much was this worth? What kind of buying power did it have?
This was answered by u/HermitCrabTuesday here. It's not the most conclusive answer in the world, so perhaps someone can answer it here in more detail, but hopefully this is useful in the meantime.