John Lennon with Julian in the Sunroom, December 1968 before Kenwood was sold.
In Peter Brown's book, "The Love You Make. An Insider's Story of The Beatles", which is very good on John and Yoko's hermetic relationship, their drug use, and their bizarre lifestyle arrangements. His description of the prolonged periods Lennon spends spaced out in the sunroom at Weybridge linger long in the mind: "At Kenwood, on a shelf in the sunroom, sat a white, pharmaceutical mortar and pestle with which he mixed any combination of speed, barbituates, and psychedelics. Whenever he felt himself coming down from his mind-bending heights, he would lick a finger, take a swipe at the ingredients in the mortar, and suck the bitter film into his mouth."