At the outbreak of the Civil Wars the town and castle were garrisoned for parliament by the mayor, John Poyer, a leading Presbyterian, who was later appointed governor, with Rowland Laugharne of St Brides for his lieutenant.
By his first wife, Margaret, daughter and heir of Sir John Plays, Sir John Howard had a son who died before him, leaving a daughter through whom descended to her issue, the Veres, earls of Oxford, the ancient Norfolk estates of the Howards at East Winch and elsewhere, with the lands of the houses of Scales, Plays and Walton, brought in by the brides of her forefathers.
She survived her marriage but a few months and her husband then obtained the wardship of her Dacre offspring, a son who died young, and three daughters whom the duke, with the true Howard eye for a rich inheritance, gave as brides to three of his sons.
The chief inlets are the mouth of the Dee, dividing Flint from Cheshire; the Menai Straits, separating Anglesea from the mainland; Carnarvon Bay; Cardigan Bay, stretching from Braich-y-Pwll to St Davids Head; St Brides Bay; Milford Haven; Carmarthen Bay; and Swansea Bay.
Waters which have a similar composition are drunk at the springs of Leamington and Cheltenham in England, Brides Salins and St Gervais in France, for chronic constipation, dyspepsia, gout and hepatic disorders of a milder character than those usually treated at Carlsbad.