Harry Ash perhaps produced this pamphlet initially in the
late 1880s or the 1890s. A pencil note on the first page says 'Design at 24.
"X" marked on each.' If this is a note by Ash, it would suggest that those
parts were designed in 1887/8. It is interesting that Ash, who, in his last
five months at school had taught himself French while the other boys were
sleeping, revived the use of the term 'chirology'.
Guide to Chirology, by Harry Ash, Watford, c. 1800s (Action on Hearing Loss Library).