I'm trying to identify this fugue subject attributed to J.S. Bach in "Treatise on the Fugue" by Andre Gedalge (page 363 here: https://s9.imslp.org/files/imglnks/usimg/5/59/IMSLP243942-SIBLEY1802.23095.8245-39087011252220text.pdf)
The alto clef may indicate that it's not a keyboard or organ fugue. It's presented in C Minor which is likely the original key. I've tried searching through lists of Bach fugues and am unable to determine where this comes from. I am looking for the full Fugue.