And his chief duties were to keep two-footed and four-footed strays from trespassing thereon.
To an inch, he knew the boundaries of the Master's land.

And he knew that no human intruder was to be molested; so long as such intruder had the sense to walk straight down the driveway to the house.

But woe to the tramp or other trespasser who chanced to come cross lots or to wander in any way off the drive! Woe also to such occasional cattle or other livestock as drifted in from the road or by way of a casual fence-gap! Human invaders were to be met in drastic fashion.

Quadruped trespassers were to be rounded up and swept at a gallop up the drive and out into the highroad.

With cattle or with stray horses this was an easy job; and it contained, withal, much fun;--at least, for Lad.
But, pigs were different.
Experience and instinct had taught Lad what few humans realize.