Windsor Soap.
This is made with lard. In France they use lard with a portion of olive or bleached palm oil. It is made with one part olive oil to nine of tallow. But a great part of what is sold is only curd (tallow) soap, and scented with oil of caraway and bergamot. The brown color is with burnt sugar, or umber.
( ED: Check out this page of Organic Gardening and Homesteading Tips for a complete recipe for making lard soap. )