First, there was the peculiar grouping of the bones.

What was the meaning of that?
Well, the idea of a punctilious anatomist was obviously absurd, and I put it aside.

But was there any other explanation?
Yes, there was.

The bones had appeared in the natural groups that are held together by ligaments; and they had separated at points where they were attached principally by muscles.

The knee-cap, for instance, which really belongs to the thigh, is attached to it by muscle, but to the shin-bone by a stout ligament.