Ah! Robert Louis Stevenson, a man after my own heart. I go everywhere with my notebook and my current reading material. Chance favours the prepared mind. A random thought emerges. The thought is pursued and drafted into the notebook. Less I forget.
“I kept always two books in my pocket, one to read, one to write in.”
― Robert Louis Stevenson, Essays of Robert Louis Stevenson
And current reading, if you're enquiring. The Penguin Book of Prose Poems