Denis Alphonsus Quinn, Stenotypy: Or, Shorthand by the Typewriter (1895)
“ The figures 8 and 9 follow the same rule. p8 (pate) ; qI9 (quinine) , whilst they, in common with the other figures and punctuation marks, stand for the affixes placed opposite them in the alphabet or key. If there is no space before or after the the figure or stop, you know it is used for an affix. cp7F (capable of) . Here, the figure 7 meaning able, ment) , having no space to left or right, is used as an affix. When used as a prefix, it must have one space to left. ”
