From: Suite101
During the middle-ages, when the vast majority of the population of Britain was illiterate, there was little need for a specific piece of furniture for writing or reading. Only the monks, who laboured away copying and recopying holy books and stories had pulpit like writing tables. However, as the middle-ages drew to a close, both literacy and leisure-time increased among the wealthy classes.
By the dawn of the Georgian age, letter writing had become popular among the upper-classes and was often used as a means to spread political discourse. Stories were written in letter form, and many letters were printed in magazine and newspaper like publications. To aid in this new activity, a new piece of furniture became popular.The writing box, or portable writing desk, was a hinged rectangular box that when unfolded provided a continuous slope upon which to write. It also normally contained an area where quills, ink-bottles, and paper could be stored.
Today, some of the spirit of the writing box lives on in the laptop computer.
Primary information for this article obtained from Portable Writing Desks by David Harris, Shire Publications, 2001.