The King of the Park by Marshall Saunders

The sergeant was intensely amused and interested in the French priest. He obtained a few days' leave from his duties, and occupied himself in showing his guest the sights of an American city. The innocence, the childishness, and the curiosity of his companion, and, above all, the attention that he attracted, provided the sergeant with the most agreeable sensation that he had had for many a day.

Eugene sometimes accompanied them, oftener he did not. He was no longer cheerful and contented, but had fallen into the reserved, quiet, almost sullen state in which he had been when Mrs. Hardy first knew him; and instead of mingling freely with the little family, he preferred to be left alone in his room, where he sat musing by the hour.