A note typed by Harold White to accompany this image states, "Though the image is lost, this is a very important item. Fox Talbot [sic], in a letter to the Literary Gazette dated 5th Feb. 1841 states that the first discovery of his Calotype Process was made on Sept. 20th 1840. This paper is dated Sept 22nd. 1840. Added in pencil is- "Sept 23 washed with E & brought out by spont.". This may be taken to read 'washed with exciting liquid & [image] brought out spontaneously'. The exciting liquid was the sensitiser containing gallic acid. On the 19th. Feb. he again wrote to the Literary Gazette stating that after making some tests, a blank piece of paper which had been treated was left lying upon a table, and some time later he was surprised to see upon it a very distinct picture. His conclusion was "- that the picture had unexpectedly developed itself by a spontaneous action. This is probably the paper referred to."