Hi David, I do not know who

Hi David, I do not know who wrote that article. I see from the end postscript that he/she had a private communication with Glyn who must have given him details after the removal of the Mond Astrograph from NLO. I will ask Glyn’s wife, Christine, if she knows who wrote it. I remember that there was a book about the history of Sir Robert Mond amongst the material I sent down to NLO with the Mond Astrograph and the measuring machines and some documents that Glyn had assembled. Did you manage to compare the  7 inch Zeiss lens that Gyln had on the Mond Astrograph and the mystery 7 inch you found? Was the focal length of the mystery 7 inch determined?