Thomas received wardship of Ada's 1st husband Richard de Lucy's daughters; and he married them to his sons.
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THOMAS DE MULTON, son and heir. He was the builder of the family fortunes both by his personal abilities and the rich marriages which he contrived to secure for himself and his children. He had succeeded his father by 1201; in 1202 was abroad in the King's service, and had pardon of tallage for himself and his men in 1204. He gave 500 marks in 1205 to be sheriff of Lincs for 7 years, but was thrown into prison in Rochester in the summer of 1208. His brother Alan appears to have served for him with the King in Ireland in 1210, and he himself to have taken part in the King's campaign in North Wales in the following year. He had regained credit and the King's favour by 1213. He presumably took part in John's disastrous expedition to Poitou, February to November 1214, and was with the King at Guildford early in 1215, but at the Easter meeting at Stamford declared himself on the side of the Barons. In December he was taken at the capture of Rochester Castle, and imprisoned at Corfe. His castle of Moulton and lands were seized and committed to the Earl of Chester. Negotiations for his liberation went on till after the death of John, and a heavy ransom was paid. He was excommunicated by name among the insurgent Barons and their chief adherents. He returned to his allegiance 29 July 1217. In 1218, after his 2nd marriage, he had order for livery of the castle of Egremont and lands in Coupland, and all his wife's lands in Cumberland and Westmorland, and was made justice in Eyre of those counties and Lancs. He was appointed a justice of the Common Pleas in 1224, and sat till 1236. He was knighted by November 1224. In Feb. following at Westminster he witnessed the confirmation of the Magna Carta and the Charter of the Forest. In 1226 he was appointed chief keeper of the annual fair at Boston. In April 1230 he was in charge of money and jewels which the King was taking to France; in May he was made joint keeper of the coast and ports of Lincs; and in October the castle of Miserden, Glos., was committed to him. He was appointed sheriff of Cumberland, with custody of Carlisle Castle, 27 January 1232/3, acting till Easter 1236; and in April 1238 a commissioner to "extend" lands in Cumberland and Northumberland for the King of Scots.
He married, 1stly, possibly circa 1190, Sarah, daughter and heir of Richard DE FLETE (son of Josce DE FLETE), by Juliane, who brought him the manor of Fleet, Lincs. He married, 2ndly, before 10 March 1217/8, Ada, widow of Richard DE LUCY (died 1213), and elder daughter and coheir of Hugh DE MORVILL, by [query] Heloise DE STUTEVILLE, which Ada was mother of the two heiresses to whom he married his sons (see Lucy). He died in 1240, His widow died shortly afterwards. [Complete Peerage IX:399-401, (transcribed by Dave Utzinger)]