"In the days that I spent in Dresden [before 1911].. ..I was together with Kirchner and Heckel a great deal.. .Here they led a singular bohemian life, liberated from any ordering of day-times and mealtimes; when they had the impulse they worked the whole night through and slept through the morning. I was convinced that they not infrequently lived on coffee, cake, and cigarettes.. .When the lamps were lit, we sat on benches and crouched over the batiked fabrics that were spread around the low table and looked at the portfolios with hand drawings and printed sheets; all the time strange, grotesque sculptures peered over our shoulders. The two showed me how they etched their lithographs, printed their etchings, and Kirchner drew two.. ..portraits of me with the dry-point needle."
January 1, 1970
https://en.wikiquote.org/wiki/Erich_Heckel