sentences:  During this period of the English reconquest in Connacht, Dillon was involved in some sharp practices with the local landholders.In particular he persuaded the various Costello freeholders of the Barony of Costello in eastern County Mayo, to save expense and ensure the smooth legal transfer, to allow him to surrender their lands for them in one land-title in the Surrender and regrant process and had it regranted in his own name, becoming the legal landowner in the process.He never returned this title to the lands to the native owners, which would lead to rapparee actions by Dudley Costello (or Costellogh) against the Dillons in the 1760s.