He was succumbing to irresistible, youthful, childish drowsiness.
Of the three, Cardinal Adrian was the first to fall ill, the pope succumbing a week after.
Instead of succumbing to the fear of redefining yourself, embrace the opportunity.
There they held out for three months, succumbing finally because in obedience to the Law (as interpreted since the time of Antiochus Epiphanes) they would only defend themselves from actual assault upon the sabbath day.
They communed together in a low voice for some time, till the burgomaster, succumbing to the influence of his potations, fumbled his way to his carriage with the assistance of some of his civic colleagues.