PICTURE CLEANING at the NATIONAL GALLERY
... To THE EDITOR OF THE MORNING CHRONICLE. SIR-My attention has lately been drawn to the contro- versy and conflicting opinions now going on in reference to the cleaning of the pictures in the National Gallery. I have spent upwards of forty years in close study and active prac- tice on the restoration of old paintings, during the last few of which I have had entrusted under ray hands the nume- ...