Morrison Waite,
Ober v. Gallagher — Opinion of the Court
“ It is undoubtedly true, that, in many of the States, the implied lien which equity raises in favor of the vendor of real property to secure the payment of the purchase-money does not pass by an assignment of the debt; but here the lien was not left to implication: it was expressly reserved. In fact, it is more than a lien. In equity, it is a mortgage, so made by express contract. The acceptance by Thompson of the deed containing the reservation amounts to an express agreement on his part that the land should be held as security for the payment of what he owed on account of the purchase-money. ”
