A Mamlūk emir's ‘square’ decree

In his catalogue of the Haram documents, D. P. Little has brought attention to a group of nine items, which he identifies with what the handbooks and other contemporary sources describe as murabba'āt One may accept the translation ‘square’ for convenience sake, but the surviving examples show that murabba'a should strictly be understood as ‘quadrangular’. Under question are documents written on a sheet of paper in ‘landscape’ mode, folded centrally to form four pages, and distinguished from documents written on a piece of paper in ‘portrait’ mode or a series of these stuck together to produce a scroll. While looking through the Cambridge University Library's varied collection of material, both paper and papyrus, that is known by the name of its immediate source, Michaelides, I came across one more example, at least, if one judges bythe shape and general lay-out. It seems to be of sufficient interest to merit a brief study, with some cross-reference to the Haram material.