Rotulus

A rotulus (plural: rotuli) is a kind of roll consisting of a long and narrow strip of writing material, historically papyrus or parchment, that is wound around a wooden axil or rod and is written on its interior face or side such that it is unwound vertically so that the writing runs parallel to the rod, unlike the other kind of roll, namely the "scroll", whose writing runs perpendicular to the rod in multiple columns.

Rotuli were historically used for:

...
Wikipedia