Name
- Henderson, James, photographer, b 18241
- Herschel, John Frederick William, 1st Baronet, mathematician and astronomer, 1792-18711
- Holtzapffel and Co., engine, lathe and tool manufacturers, 1826-19281
- Hughes and Kimber, copper and steel plate makers, 1850-18741
- Hunt Fourdrinier and Co., stationers and paper manufacturers, fl 1846-18471
- Hunt, Robert, scientist and photographic historian, 1807-18871
- J. Duboscq, optical instrument makers, 1849-18861
- J. L. Cox and Sons, printers, fl 18411
- James Ridgway, booksellers and publishers, 18301
- James Stillie, bookseller, fl 1846-18631
- John Rodwell, booksellers and stationers, fl 1832-18441
- Jones and Yarrell, booksellers and newsmen, 1760-1
- Kemp and Co, philosophical instrument makers and chemists, fl 1858-18701
- Librairie Galignani, booksellers, Paris, 1801-1
- Longman, Brown & Co, publishers, 18411
- Madame Huzard, booksellers and printers, 1800-18391
- Maret, Hugues Antoine Joseph Eugène, Marquis de Bassano, photographic entrepreneur, 1806-18891
- Murray, John, publishers, 1768-20131
- Perthes and Besser, booksellers, 1814-1
- Poole and Carpmael, patent agents, 1835-1