He'd already said good bye to all of them earlier.
He was saying good bye.
We waved but he never stopped to say good bye.
His antagonism to the secular clergy was also shown later, when in 1603 he, with other Jesuits, was the means of betraying to the government the " Bye Plot," contrived by William Watson, a secular priest.
After reading Bye, Bye Big Bad Bullybug, by Ed Emberly, let students create their own thumb print bugs.
