Yes, plenty. Here is a half random sampling (random in the sense that I did not aim at any particular part of the manuscript, but not random insofar as I made sure all the fragments I selected had at least an ēta or two):
The fragment in question is there, too, on the bottom left, for comparison. Actually, as I do more comparisons, I am thinking that it might have to be an ēta, on its own merits (no context required), if it is not just a smudge. The other letters I had in mind (such as nu and upsilon) would not explain that hard angle from vertical to horizontal.
These are definitely uncial (majuscule) letters. Minuscules were not invented until the Middle Ages.and 2: right after what looks like it might be an eta is what looks like a C. Were the letters being used uncial?
Yes. We call it the lunate sigma. It was the standard sigma in antiquity. It is what we find in nearly all the Greek manuscripts relevant to our field of inquiry.Was sigma being rendered with a C?