Penners
Purses in Pieces: Archaeological Finds of Late Medieval and 16th century Leather Purses, Pouches, Bags and Cases in the Netherlands

A penner is a sort of case used to contain pens and related scribal tools, and is often connected to an inkhorn.

For a more detailed view of a penner and how it was constructed, see Purses in Pieces: Archaeological Finds of Late Medieval and 16th-Century Leather Purses, Pouches, Bags and Cases in the Netherlands.

Some additional webpages on penners: Scribal Tools: The Penner & Inkhorn, Personal Items, Randy Asplund’s Scribe and Illuminator Tools.