When these people say that these are Early recipies they are not kidding. The recipies in this book date from the late middle ages. These are the dishes that a master chef in the employ of say a regional duke would fix.
These recipies have been found in olf manuscripts, and in old books dating from that time. The recipies were then translated into English and then tested. A lot of the spices used in those times frequently had different names than what we use today, so where needed new more current names have been given.
Most recipies are of things that we cook today and which will be familar to today's cooks and eaters: Black Pepper Sauce, Shoulder of Mutton, chickens, eggs, fish. Some of the combinations (Scrambled Eggs and Apples) seem a bit unusual for today's tastes, but on the other hand that sounds intriguing enough that it might be worth a try.
This is an unusual book in that it shows the origin of modern French cooking. Interesting reading to see the prominence that sauces were playing a prominent role in French cooking so long ago.