Before that they were just the Principal Doctrines with no number attached then it looks like?
It seems to me that i have read it theorized that they were never numbered in the ancient world at all, and that it was read like a book, like the letter to menoeceus, and in fact what we consider the 40 doctrines may well be one of the books of Epicurus that Cicero refers to as -- gosh what was it -- the "celestial book?" This is definitely something that i've always wanted to pursue because I think the numbering is a MAJOR problem for interpretation, especially for what we consider to be 3 and 4, which I think ought all to be read together and probably closely in context of 2. Splitting them apart really adds to the problem with making sense of them
But Usener evidently had a profound dislike for Diogenes Laertius!
Now THAT i have never heard. Do you gather it was for more than the standard criticism that DL was a gossiper more than philosopher?