A rolltop desk is a 19th-century reworking of the pedestal desk with, in addition, a series of stacked compartments, shelves, drawers and nooks in front of the user, much like the bureau à gradin or the Carlton House desk. In contrast to these, the compartments and the desktop surface of a rolltop desk can be covered by means of a tambour consisting of linked wooden slats that roll or slide through slots in the raised sides of the desk. In that, it is a descendant in function, and partly in form, of the cylinder desk of the 18th century. It is a relative of the tambour desk, whose slats retract horizontally rather than vertically. The rolltop desk was re-invented by Jacob Alles in Jasper, Indiana in 1879. "About 1760 Jean-François Oeben designed a new type of bureau: the original rolltop desk. The writing area can be covered by a shutter made of flexible slats, which is rolled round a cylinder hidden behind the top tier of drawers. In the Château de Versailles is found the most famous example of this type of desk, the "bureau du roi," which was begun by Oeben in 1760 and finished by Riesener. Riesener made several rolltop desks; the one for Thierrry de Ville d'Avray indicates that the Louis XV style was not yet regarded as outmoded in the 1780s".