The Old English representation, inclusive of the long S, is consistent with the 1847 source material, as you can see here: https://archive.org/details/firstsixbooksofe00byrn/page/n21/...

The first printed copy, of 1482, was in Latin: https://www.loc.gov/item/2021667076/

The Greek (Ελληνικά) representation is presumably consistent with Euclid's original manuscript, e.g. as represented in this copy, of 888: https://historyofinformation.com/detail.php?id=208