"It might be a very thick human collar-bone," I said.
My companion waved his hand in contemptuous deprecation.
"The human collar-bone is curved. This is straight. There is a groove upon its surface showing that a great tendon played across it, which could not be the case with a clavicle."
"Then I must confess that I don't know what it is."
"You need not be ashamed to expose your ignorance, for I don't suppose the whole South Kensington staff could give a name to it." He took a little bone the size of a bean out of a pill-box. "So far as I am a judge this human bone is the analogue of the one which you hold in your hand. That will give you some idea of the size of the creature. You will observe from the cartilege that this is no fossil specimen, but recent. What do you say to that?"
"Surely in an elephant——"
He winced as if in pain.
"Don't! Don't talk of elephants in South America. Even in these days of Board schools——"
"Well," I interrupted, "any large South American animal—a tapir, for example."
"You may take it, young man, that I am versed in the elements of my business. This is not a conceivable bone either of a tapir or of any other creature known to zoology. It belongs to a very large, a very strong, and, by all analogy, a very fierce animal
