"Our lost one has strayed very far, even for one who could flit over all the Earth on a whim."

Whim is really the guiding force of that one, after all.

"Many eyes may find him faster than one pair alone, so I'd send you on together."

Were it up to Hellebore, he would go ahead quite alone and seize the creature single-handed - but he knows full well that his presence might only cause flight. Not desirable when the one they seek was always faster than he; not stronger, never that - but fast enough that he has to admit the unlikelihood of catching him if he fled.