11.   Strain sauce and keep warm.

12.   Strain sauce through a fine sieve into a small saucepan.

13.   Strain sauce, and return it to a clean pan.

14.   Strain sauce, and return to a clean pan.

15.   Strain sauce.

16.   Strain the sauce into a small saucepan.

17.   Strain sauce into another small saucepan.

18.   Strain sauce, pressing hard on shallots.

19.   Strain the sauce and discard the bones and vegetables.