You see that I am weaving my web round Thaddeus.

The net begins to close upon him." "You are not quite in possession of the facts yet," said Holmes.

"This splinter of wood, which I have every reason to believe to be poisoned, was in the man's scalp where you still see the mark; this card, inscribed as you see it, was on the table; and beside it lay this rather curious stone-headed instrument.

How does all that fit into your theory ?" "Confirms it in every respect," said the fat detective, pompously.
"House is full of Indian curiosities.

Thaddeus brought this up, and if this splinter be poisonous Thaddeus may as well have made murderous use of it as any other man.