I will have something else up later today; after all, I do plan to make bread of some sort. I just thought I would offer a few brief thoughts on my (continued, but still not complete) reading of The English Bread Book . So, here are my thoughts. The "German yeast" used in 1857 seems to be like the yeast variously called "fresh yeast", "wet yeast" or "yeast cakes" that are often available (though I personally use the dry yeast). This seems to have been only available for sale in bakeries. If you've never seen fresh yeast, here's some (actual size about 1 inch by ½ inch by ½ inch): Fresh yeast. (Image courtesy of ElinorD, via Wikimedia Commons). Since German yeast was relatively expensive and didn't last long, the yeast in common use was that which would have been used in brewing beer; and there's considerable discussion of how it can be affected by hops, gentian, and other ingredients used to flavor beer or ale; also of...
... I make the bread.