Search Only Images Download this image Portrait of John Harrison No info available for book source. Image ID: SIL-SIL14-h002-13 Supplied Caption: Portrait of John Harrison. Engraving by William Holl, 1807-1871, published by Charles Knight. After Tassaert, after King, 1768. Tags: Scientific Instruments, Harrison, John (1693-1776) Categories: Science Collection(s): Scientific Identity No Copyright - United States Request copy of image How can I use this image?