Chapter 7, Footnote #08
A note by Helen Taylor about these threating letters
At one time I reckoned that threats of assassination were received at least once a week; and I remarked that threatening letters were always espcially numerous by Tuesday's morning post. I inferred that they were meditated during the Sunday's leisure and posted on the Mondays. It might be worth while to collect evidence as to the proportions of crime committed on the different days of the week. It may be observed however that in England Sunday is generally used for all kinds of letter writing, innocent as well as guilty. [Helen Taylor.]