In contrast to the sheets used by other contemporary natural-ists, he refrained from binding his into a proper book and this allowed him to stack them in abespoke cabinet (arca) in a manner that allowed him to insert, remove and reorder them as he sawfit (Figure 9).64 It was for this reason that the Philosophia botanica gave explicit instructions onhow to build the cabinet and how to organize the specimen sheets within it. He recommended thatthe internal space be split into two columns with shelves that were collectively divided intotwenty-four sections, each of which was assigned a numerical head that represented a class withinhis system.65Each class section was filled with select specimen sheets divided by bands intogenera. In his words: If the folding doors are marked with the numbers and names of the genera, with the space on the shelvescorresponding exactly, and linden bands are kept between the spaces, enclosing the same genera andthemselves marked with the number of the genera, then any plant can be pulled out and produced with-out delay.66