It often happened that provincial Sunday societies offered me the usual ten genuine fee to give the usual sort of lecture, avoiding controversial politics and religion. I always replied that I never lectured on anything but very controversial politics and religion and that my fee was the price of my railway ticket third class if the place was farther off than I could afford to go at my own expense. Occasionally to avoid embarrassing other lecturers who lived by lecturing, the account was settled by a debit and credit entry, that is, I was credited with the usual fee and expenses and gave it back as a donation to the society. The Sunday Society would then assure me that on these terms I might lecture on anything I liked and how I liked.