But, for all that, his eyes kept following the Doctor about the room with a thoughtful fixity of gaze.

Desprez could not tell whether he was fascinating the boy, or the boy was fascinating him.

He busied himself over the sick man: he put questions, he felt the pulse, he jested, he grew a little hot and swore: and still, whenever he looked round, there were the brown eyes waiting for his with the same inquiring, melancholy gaze.
At last the Doctor hit on the solution at a leap.

He remembered the look now.

The little fellow, although he was as straight as a dart, had the eyes that go usually with a crooked back; he was not at all deformed, and yet a deformed person seemed to be looking at you from below his brows.
The Doctor drew a long breath, he was so much relieved to find a theory (for he loved theories) and to explain away his interest.
For all that, he despatched the invalid with unusual haste, and, still kneeling with one knee on the floor, turned a little round and looked the boy over at his leisure.