I thought it was amusing enough to include here.
Earlier versions like the one above, say "History Free for a Stamp" .
Later ones like the one below from 1960 says "History Free for a Shilling" .
. . .and you have to include a stamped self addressed envelope!
Funny. . . That's not my idea of free.
Especially since most Badgers only cost 2 shillings and six-pence!