An act for settling the real and leasehold estates of the most honourable Margaret Brydges, commonly called Marchioness of Carnarvan, Wife of the Most Honourable James Brydges, Esquire, commonly called Marquis of Carnarvan, and late Margaret Nicoll Spinster, an Infant, for the Benefit of the said Marquis and Marchioness, and their Issue; and for applying Part of the said Marchioness for personal Estate for the Purposes therein mentioned.