A boar can with great pain live twenty years; he never casts his teeth nor his tusks nor loses them unless by a stroke.[83] The boar's grease is good as that of other tame swine, and their flesh also. Some men say that by the foreleg of a boar one can know how old he is, for he will have as many small pits in the forelegs as he has years, but of this I make no affirmation. The sows lead about their pigs with them till they have farrowed twice and no longer, and then they chase their first pigs away from them for by that time they be two years old and three Marches counting the March in which they were farrowed.[84] In short they are like tame sows, excepting that they farrow but once in a year and the tame sows farrow twice. When they be wroth they run at both men and hounds and other beasts as (does) the wild boar and if they cast down a man they abide longer upon him than doeth a boar, but she cannot slay a man as soon as a boar for she has not such tusks as the boar, but sometimes they do much harm by biting. Boars and sows go to soil gladly when they go to their pasture, all day and when they return they sharpen their tusks and cut against trees when they rub themselves on coming from the soil. _What men call a trip of tame swine is called of wild swine a sounder, that is to say if there be passed a five or six together._ [83] At this point G. de F., p. 61, adds: "One says of all biting beasts the trace, and of red beasts foot or view, and one can call both one or the other the paths or the fues." [84] See Appendix: Wild Boar. CHAPTER VII OF THE WOLF AND OF HIS NATURE