An isometrical illustration of Aberdeen from 1889. This document was distributed as a supplement to the Aberdeen Daily Free Press newspaper of 18th December 1889.
An article accompanying the illustration, describing changes in the city during the preceding 25 years, can be found on page 6, column 6 of that issue.
The above mentioned article credits the illustration to Messrs. A. Gibb & Co., lithographers. The text in the bottom right of the document reads "Drawn from nature by Andrew Gibb & Co., lithographers, Aberdeen."
This illustration can be seen as an updating of Hays' Isometrical View of Aberdeen from 1850. The earlier plan was drawn by a young George Washington Wilson.