I noticed today that not all titles in the Perseus classics library (and Noet library) are available in English. The title I was looking for was De Compositione (English title: Literary Composition) from Dionysius of Halicarnassus. Yet there are many titles that are available both in either Greek or Latin and in English. Made me wonder why not all. Even for those who have access to either Greek or Latin, it can be faster to check an English translation quickly than to translate a passage with obscure vocabulary or grammatical features.
Also versification is not always complete. For instance, I came across a reference to Polybius' Histories 2.57.1–2.63.6. Clicking on it leads me to Plb., Hist. 2.58–62 (book 2 chapters 58-62). In the case of allusions, it is not easy to find the actual verses being referred to. I know it's free (Perseus that is). But since it is featured in several Noet collections and since there is apparently interest in catering to research in the classics, I thought I would point that out.
