Definition of to do:
(n) :
an old English measure of weight, usually of wool, containing two stone or 28 pounds; a
fox, by extension, a
crafty person
"1882: Generally, however, the stone or petra, almost always of 14 lbs., is used, the tod of 28 lbs., and the sack of thirteen stone. — James Edwin Thorold Rogers, A History of Agriculture and Prices in England, Volume 4, p. 209."