#OTD in 1894.
French anarchist Martial Bourdin accidentally kills himself while attempting to plant a bomb at the Royal Observatory, Greenwich, a fictionalised version of which appears in Joseph Conrad's novel The Secret Agent (1907). Bourdin's motives remain a mystery as does his intended target, which may have been the Greenwich Observatory.
https://en.wikipedia.org/wiki/Martial_Bourdin
The Secret Agent at PG:
https://gutenberg.org/ebooks/974