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.