Twenty-second London edition printed 1876.The author is not credited on the title page. C. Mayo signs the preface of the original edition, in which he credits his sister for “the execution of the details” resulting in “the Exercises, now for the first time presented to the public.” A preface signed by Elizabeth Mayo was added to the fourteenth edition (1855). According to her preface:
The first series exercises the perceptive faculties, arresting attention on qualities discoverable by the senses and furnishing a vocabulary to clothe the ideas. The second and third series exercise the perceptive powers in recalling the impressions made upon them by external objects when they are removed from observation. The fourth series exercises children in tracing resemblances and differences, in drawing comparisons and recognising analogies, thereby cultivating the power of arranging and classifying. In the fifth series reason and judgment are brought into activity by tracing the connection between cause and effect, between use and adaptation, and the power of expression is cultivated.
Some changes and additions have been made to the objects in the lessons. The Schultz Archive's copy is roughly the complete text