Possessory lien
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
One which attaches to such articles of another's as may be at the time in the possession of the lienor, as, for example, an attorney's lien on the papers and documents of the client in his possession.
Weed Sewing Mach. Co. v. Boutelle, 56 Vt 570, 48 Am. Rep. 821.