A compilation of several volumes of Marshall's tunes is available <<https://www.worldcat.org/title/marshalls-scottish-melodies-airs-strathspeys-reels-jigs-c-for-the-violin-being-a-compilation-of-four-volumes-published-separately-in-the-19th-century-by-various-houses/oclc/5792599|here>>. It is not clear if this is the same as any of the publications listed for him in the database as they only contain a few of these tunes and have more abbreviated titles.