To immortalize the noble memorie of the right honourable young Lords Iames and Charles Egerton : both vicounts of Brackley, both onely heires to the Earledome of Bridgwater, and both onely sonnes to that noble earle, by his gracious and princely ladie, Frances Countess of Bridgwater, a fruitfull branch of the ancient House of Darbie, and noble familie of the Spencers /