She must go on riding over rough roads on her errands of mercy.
He was coming at a pace that might have landed him as winner of the race if he had not been delayed by his errand of mercy.
Dressed in clerical garb, the peasants who passed probably regarded him as a monk on some errand of mercy.
And when the guard hurried away on what he supposed was an errand of mercy, the two rascals slipped away.
