But again, what could I do to help on any secret or dangerous errand?

At first they both appeared embarrassed, for with his usual complaisance he was busy on a secret errand.

Unseen, unnoticed, he was leaving the circus lot upon a secret errand.

In that year he sent out the first of his folk that passed his gates from within: a few only, upon a secret errand.

Tall, grim and silent, he tirelessly roams the streets on some secret errand.

"Certainly, there is a boy who seems to have some secret errand."

Ships did sometimes cross the border on secret errands, both ways.

She'd sent him out late the night before on some kind of secret errand.

The handmaid went off on her secret errand and Cait settled back to wait.

Then, kissing him, she goes out on a secret errand.