Green’s Dictionary of Slang

All Hallows n.

[poss. an ironic reflection on orig. meaning of All Hallows, all holy men or all martyrs; the martyrs in question being those who are duped]

(UK Und.) the tolling place, presumably the place where the theft actually takes place, as described by those working as horse-stealers.

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[UK]Greene Second Part of Conny-Catching in Grosart (1881–3) X 87: In Prigging Law. The horse stealer, the Priggar. The horse, the Prancar. The towling place, All-hallowes. The towler, the Rifler. The suertees, Querris.