Can anyone identify these characters

Not necesserily the font, only letters.
They're from the cover of “The Elements of Typographic Style”.

Comments

i would guess by the rest of the character grouping that they are also e's, perhaps just in different alphabets/languages. ?

You're right. The n-looking one is probably Greek Eta (η). Any idea about the font?

Well 2.png is the Greek letter eta. As for 1.png, it corresponds to the open-mid central rounded vowel (in IPA, the international phonetic alphabet) and the tilde on top of it should mean that it is nasalized.

Thank you for help.