"It looks suspicious." "Strange enough, and certainly suspicious.

The point is, is it suspicious enough to upset the theory of suicide?
The marks are too faint to enable us to determine whether they are of recent origin.

But I think that we must assume that they are.

It has occurred to me that they may have been caused when the body was picked up from the floor of the other room and carried in here." "In that case the marks would have been underneath the arm.

In lifting a heavy weight like a corpse it would be natural to place the hands under the shoulders, for greater lifting power." "There's something in that, but it's by no means certain.