Make your choice, adventurous Stranger,
Strike the bell and bide the danger,
Or wonder, till it drives you mad,
What would have followed if you had.

C. S. Lewis (1898-1963) English writer, literary scholar, lay theologian [Clive Staples Lewis]

The Magician’s Nephew, ch. 4 “The Bell and the Hammer” (1955)
    (Source)

Inscription below the bell in Charn.