Thank you both for your replies, this worked like a charm, I was able to get rid of all instances of that string.
This particular pub is really full of extraneous metadata information sprinkled throughout the text, is formatted haphazardly, with multiple html files that don't seem to have been cut for any logical rhyme or reason, and on and on.
So I will continue working with it in Sigil. Thank you again, I'll be sure to come back and ask for more help if I get stuck again.
