How to get small caps

I salute your use of the ash character, the nearly-extinct ae fusion ligature. My American English computer coupled together with google won't accept that spelling without changing it to simplified American spelling.  But I do acknowledge that you had the language first! 

https://en.wikipedia.org/wiki/%C3%86

Interesting! I didn't know that. I was imagining the OP meant uncial-style lettering. Is the expression "Medieval numbers" a common expression in Europe?

Hi 1955,

I don't know about "medieval numbers" (maybe as graphics?) but small caps may or may not appear in epub reader systems. Epub readers vary in what they support, and most won't. However, some say it can work. Here is a reference:

https://www.publisha.org/Research/indesignusers/

They say make sure to use a character style to make the small caps. Then, test in various popular reader softwares. Remember that many epub reader systems greatly simplify the presentation, so try not to apply a book-typesetter's training to the much-simpler epub world.