If the journey from the town where the prisoner is held to the town where he is to be committed on the service of a mittimus can be made by railroad, the officer may convey the prisoner through any portion of another county in the prosecution of such journey.
Mass. Gen. Laws ch. 276, § 43
Conveying prisoner through another county
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.