At what was probably their height in Carbery, between the late 16th century and their partial dispossession following the so-called Irish rebellion of 1641 and the Irish Confederate Wars in the mid 17th, the O'Donovans were in control of approximately 100,000 acres right in the center of the principality, with territories both in West and East Carbery. Of this, however, only around 15,000 acres were usable as farmland. In the remaining they were still owed rents and had the rights to hold court(s), fairs, and so on. From the several harbours and bays they controlled actually came their chief income, which was the case for lords all along the South Munster coast. Following the Cromwellian confiscations, the infamously ungrateful Charles II of England, after first giving his deceitful word he would restore them entirely, granted the vast majority to soldiers of Cromwell's army in lieu of pay. The O'Donovans would regain possession of less than one twentieth their former territories, a few thousand acres... although this was better than many Gaelic families did. The great MacCarthys Reagh lost virtually everything, receiving not enough back to even live on respectably, a few hundred acres out of the approaching they once controlled at their height (this included the O'Donovan territories, which were at one time probably much less than 100,000 acres), so they eventually left.