Where any person shall be equitably entitled to any manor or land, but the legal estate therein shall be in some trustee or trustees, it shall be sufficient for such person to convey the same for the purposes of this Act without the trustee or trustees being party to the conveyance thereof; and where any married woman shall be seised or possessed of or entitled to any estate or interest, manorial or otherwise, in land proposed to be conveyed for the purposes of this Act, she . . . F1 may convey the same for such purposes by deed, without any acknowledgment thereof; and where it is deemed expedient to purchase any land for the purposes aforesaid belonging to or vested in any infant or F2person of unsound mind, such land may be conveyed by the guardian or committee of such infant, or the committee of such F2person of unsound mind, respectively, who may receive the purchase money for the same, and give valid and sufficient discharges to the party paying such purchase money, who shall not be required to see to the application thereof.