I am engraving a score that was hand-drawn in the 1950s, and have come across some odd notation choices. Some of them are these string indicators written on the violin and viola lines, using Roman numerals and followed by a mysterious “c.” (pictured below)
What’s the deal with these kinds of indicators? I cannot find any documentation about how to put these Roman numerals in for bowed strings, only finding a feature request from last year. When I attempt to put Roman numerals into the fingerings popover, nothing happens.
Part of this is asking how to notate this in Dorico, but part of it is also asking what this symbol means in the score: what does the “c.” mean after the numeral? All help is much appreciated- thank you!

