It was simple wolfish howling increased in fervour to an electric yell, with slight barks running continuously through it like an obbligato accompaniment.
When Crusoe first heard the unwonted sound he sprang to his feet, bristled up like a hyena, showed all his teeth, and bounded out of the tent blazing with indignation and astonishment.

When he found out what it was he returned quite sleek, and with a look of profound contempt on his countenance as he resumed his place by his master's side and went to sleep..