Chapter 11! With a new mishnah - on the absorption of the blood of a sin-offering into the kohen's garments, upon which it has sprayed, and the fact that it must be laundered. But if the sin-offering itself was disqualified, then the blood from that animal does not need this kind of washing. Plus, what about the blood from a bird-sin-offering? Does its neck constitute a receptacle, or a vessel, for collecting the blood? Plus, what if the bird left the courtyard? When is its wanderings relevant to the validity of the bird offering? Plus, the sin-offering that comes to exclude the bird sin-offering.