Thank you very much for taking the time to edit the output style.
As suggested, I put MS 1234 in front of the inserted footnote. But with multiple MS entries (different numbers of manuscripts), it caused a problem at the time of ibid entries.
I think your edited style will help me better. The only thing is, I will have to manually adjust the bibliography to get a one line entry for multilpe manuscript entries in the same archive.
Thanks again.