Sentence:  By procuring his Majesty to release to several Irish papists, some whereof were deeply engaged in the horrid rebellion of that kingdom, the <WSD>chiefery's</WSD> or head-rents reserved to the crown, out of the forfeited estates of papists Papists there, being a principal part of his majesty's revenue in that kingdom. 
Meaning of the word marked with <WSD> tags:  An Irish head tax