Joseph Bain states that the de Morville's held one-third of half Lauder and Lauderdale for one knight's service. It would appear that de Morville's superiority did not extend over the entire valley of Lauderdale which, by his own demarcation recorded in the "Chronicle of Melrose", stopped at the Lauder burn south of the town. This appears to be confirmed by the fact that a charter mentions Hugo de Morville possessing half of the mill of Lauder being the mill lands and rights south of the Lauder Burn, the other half being in the possession of the Lauder family. De Morville's inheritance passed to Alan of Galloway and later, to his daughter Ellen who had married Roger de Quincy, 2nd Earl of Winchester. Their daughter Margaret (d.1280) married William de Ferrers, 5th Earl of Derby and in 1290 their son "the late Sir William de Ferrers, Knt.," (d.1287) was on record as holding them.