I’m afraid I don’t have any information on the graphic from the ‘Navy and Army Illustrated’, but the cover of Ludovic Kennedy’s ‘Nelson’s Band of Brothers’ was adapted from the engraving ‘Victors of the Nile’ published in 1803 by Robert Bowyer, designed by Robert Smirke and engraved by William Bromley, with the portrait of Nelson after William Satchwell Leney. This was published as part of a set of four engravings commemorating the Glorious 1st of June, St Vincent, Camperdown and the Nile. See
http://www.npg.org.uk/collections/searc ... =sit&rNo=1 and
http://www.nmm.ac.uk/collections/nelson ... ID=PAH5670The Grignon sketch was drawn in February 1799 at Palermo (but apparently sometimes incorrectly labelled Naples 1797), and seems to have been reproduced as a lithograph after it was acquired by the United Services Club. A lithograph was engraved by Charles Couzens, printed by M & N Hanhart and published by Henry Brooks. See here:
http://www.nmm.ac.uk/collections/prints ... ID=PAD3760I wonder whether the ‘Navy and Army Illustrated’ assembled their own composite illustration from the two?