solitude
Retreated from the world and found something there.
The Duke Who Went Underground
He built the largest ballroom in England and used it to roller-skate alone.
The Man Who Weighed the Earth and Hid From His Housekeeper
He measured the density of the entire Earth. When he saw his housekeeper on the stairs, he built a second staircase.
The Man Who Loved a Pigeon
Nikola Tesla loved a pigeon as a man loves a woman. When she died, he said his life's work was finished.