This are two ePub versions from two beginners' dictionaries for classical languages: An Intermediate Greek‒English Lexicon by Henry George Liddell and An Elementary Latin Dictionary by Charlton T. Lewis.
These dictionaries come from the Perseus Project, but they don't have another source than the two .mobi files for Kindle that I found at Mobileread.
They are far from being perfect (and I don't claim or intend them to be). I know that proper Greek is missing form the Latin dictionary.
The ePub documents have the fonts embedded. Otherwise they aren't readable with a e‒ink reader. Searching isn't possible unless you can write the words as displayed text with all diacritics.