Untended Animals in Massachusetts

Some laws are obviously old and obsolete, and should just be presented in their entirety. Massachusetts General Law § 49:24 is one of these:

"Every field driver shall take up horses, mules, asses, neat cattle, sheep, goats or swine going at large in the public ways, or on common and unimproved land within his town and not under the care of a keeper; and any other inhabitant of the town may take up such cattle or beasts so going at large on Sunday, and for taking up such beasts on said day the field driver or such other inhabitant of the town may in tort recover for each beast the same fees which the field driver is entitled to receive for taking up like beasts."

So the "field driver" can get a fee for taking up certain untended animals roaming at large in town. Private citizens may do so, but only on Sundays. So was Sunday the field driver's day off?