Book written by Baron Gruner on the subject of Chinese Pottery

“Who told you I was a connoisseur?”
“I was aware that you had written a book upon the subject.”
“Have you read the book?”
“Dear me, this becomes more and more difficult for me to understand! You are a connoisseur and collector with a very valuable piece in your collection, and yet you have never troubled to consult the one book which would have told you of the real meaning and value of what you held.”