Plans and perspective drawings

I HAVE frequently observed, that those who perfectly understand a drawing in perspective, have, sometimes, no idea of a plan, or map, and are not ashamed to confess they do not understand either. I will, therefore, avail myself of the following letter, addressed to a lady; and I trust the difficulty will be removed, by referring to the plate [fig. 210], which gives an example of both the map of a garden, and the ground plan of a house, and its appendages.