some of the patterns are older than 30's and the ad does say from the 30's & up---i did not see anywhere where it said they were 'original' patterns- just that there are alot of quilting patterns- of quilts from the 30's & newer-
i noticed a couple that are much older (based) than that- and as for the 'lemon star' there are places that do call it that- i have an old quilt pattern book (1970's) that has it listed as a lemon star....different regions have their own names for many old blocks- there are about a dozen different names for what some of us call the 'drunkards path'
if you are looking for older- traditional quilt block patterns those would probably be worth looking through