Final answer:
Marcellus does not work as a scrivener.
Step-by-step explanation:
Out of the given options, Marcellus does not work as a scrivener. Scriveners were professional scribes who were responsible for writing and copying legal and administrative documents. While Marcellus may have engaged in other activities such as picking melons, herding cattle and oxen, and teaching sculpture, there is no information to suggest that he worked as a scrivener.