Another angle: Could this be about a software or a publication? Sometimes technical publications or software have volume numbers and update numbers. If it's a technical document or a research publication by Roy Stuart, the volume might be part of a series with regular updates.
In conclusion, without more context from the user, I should request them to provide additional details to narrow down the possibilities and offer more accurate assistance. roy stuart glimpse vol13 20 upd
I should consider different possibilities. Is "Glimpse" part of a literary series, maybe a book series where each volume is updated periodically? If Volume 13 has an update, the user might be asking where to find it or if there's an official release. Also, the mention of "20" could be version 20 of the update. Maybe checking for an updated edition of this volume. Another angle: Could this be about a software