"When a person is acquiring rights with respect to any subject-matter, the fact whether he is so acting with or without notice of the interests or claims of others in or upon the same subject-matter is regarded throughout the whole range of equity jurisprudence as a most material circumstance in determining the extent and even the existence of the rights which he actually requires. In conformity with this view, the general rule has been most clearly established, that a purchaser with notice of the right of another is in equity liable to the same extent and in the same manner as the person from whom he made the purchase. The same rule may be thus expressed in somewhat different language; a person who acquires a legal title or an equitable title or interest in a given subject-matter, even for a valuable consideration, but with notice that the subject-matter is already affected by an equity or equitable claim in favour of another, takes it subject to that equity or equitable claim. On the other hand, a person who has acquired a title, and paid a valuable consideration, without any notice of an equity actually existing in favour of another, may by that means obtain a perfect title, and hold the property freed from the prior outstanding equity." "The third, and in its practical effects by far the most important, rule is that a party taking with notice of an equity takes subject to that equity. The full meaning of this most just rule is that the purchaser of an estate or interest, legal or equitable, even for a valuable consideration, with notice of any existing equitable estate, interest, claim, or right, in or to the same subject-matter, held by a third person, is liable in equity to the same extent and in the same manner as the person from whom he made the purchase; his conscience is equally bound with that of his vendor, and he acquires only what his vendor can honestly transfer. The applications of this rule are as numerous as are the various kinds of equitable interests. The following are some of the most important: A purchaser with notice of a trust, either express or implied, becomes himself a trustee for the beneficiary with respect to the property, and is bound in the same manner as the original trustee from whom he purchased. A purchaser or mortgagee with notice of the equitable lien of a vendor for unpaid purchase price takes the land subject to that lien. A purchaser or mortgagee of the legal estate, with notice of an equitable lien created by a deposit of title deeds, or by a prior defective mortgage, or by any other means from which an equitable lien can arise, is bound by the lien. A purchaser with notice of a prior contract to sell or to lease takes subject to such contract, and is bound in the same manner as his vendor to carry it into execution. These examples are of ordinary occurrence." (Footnotes omitted.)