Scholarship requires fuel, after all

On my first day in London I made an early start. Reaching the Public Record Office not much after ten, I soon secured the papers needed for my research and settled in my place. I became, as is the way of the scholar, so deeply absorbed as to lose all consciousness of my surroundings or of the passage of time. When at last I came to myself, it was almost eleven and I was quite exhausted: I knew I could not prudently continue without refreshment. 

Sarah Caudwell, Thus Was Adonis Murdered (New York: Dell, 1994), p. 4. (copyright 1981)