Lovely 19th Century Academic Charcoal Drawing of a Dog

Quite a beautiful small drawing, charcoal I believe, clearly with its maker having been quite precise about the proportions of this dog's head! I like how two horizontal toning lines running from the left eye evoke a sense of this creature seeing both straight ahead and to the side at once, too! One heavy paper, initialed on reverse at upper right.

5" x 3 1/2" and in good antique condition.