Emile de Maat
I'm sure the encounter doesn't actually say you gain the Massa di Requiem per Shuggay artifact.
I wonder why you are so sure There are quite a few Research encounters that award a specific artifact, such as Azathoth #16: "... Gain the Massa di Requiem per Shuggary Artifact. You search the pages for the knowledge you seek (Observation test). ..."