the world > food and drink > farming > animal husbandry > keeping birds > [noun] > keeping of swans > marking of swan (11)
The action of catching and marking swans. (See up, v. 1, and cf. swan-hopping, n., swan-upping, n.)
The action or practice of ‘upping’ or taking up swans and marking them with nicks on the beak in token of being owned by the crown or some…
the operation of marking swans.