E. Lazenby and Son
Elizabeth Lazenby and Son of 18 Trinity Street, London (1908)
of 20 Soho Square, London, W1. (1929)
Ditto Address. Telephone: Gerrard 9261. Cables: "Unexcelled, London." (1947)
1776 Company established.
1815 Advert concerning Harvey's Fish Sauce signed by Elizabeth Lazenby and the Fish Sauce Warehouse 
1816 Mentions the late Mr Harvey's celebrated sauce for fish, game etc. of Lazenby's Warehouse, 6 Edward's Street, Porman Square. 
1895 The company was registered on 29 January, to acquire the business of fish sauce and preserved provision manufacturers of the firm of the same name. 
1895 Incorporated as a private limited company.
1914 Sauce, pickle and soup manufacturers. Specialities: owners of original recipe of Harvey's Sauce, Chef sauce; solidified and liquid soups, preserved provisions and condiments of all kinds. 
1929 Listed Exhibitor - British Industries Fair. Manufacturers of Pickles, Sauces and Condiments, Jellies, Essences and Invalid Foods, Non-alcoholic Beverages, Custard Powder and other similar products, Preserved Fish, Fruit and Vegetables. (Stand Nos. K.20 and K.33) 
1947 Listed Exhibitors - British Industries Fair. Manufacturers of Harvey's** Sauce, Piccalilli, Mixed Pickles, Salmon, Crab, Lobster, Prawns. (Earls Court, 1st Floor, Stand No. 737) 
Note: ** From: The Sporting Magazine. September 6th, 1842 on Harvey's Sauce
- "It is not a little singular that Captain Combers may be said to be the original propagator of the celebrated Harvey's Sauce. When on his road to Leicestershire on one occasion, he stopped, as was his custom, at Bedford to dine at the principal inn, then kept by Harvey, and had ordered a rump-steak. Mine host was in attendance, when Combers requested him to desire his servant to bring from his buggy a quart bottle which contained an admirable sauce. Having mixed some of the condiment with the gravy of the steak, he asked Harvey to taste it, which he did, and immediately pronounced it a most excellent sauce for steak, chop, cold meat, or fish. — "Well, Mr. Harvey," said my friend, "I shall leave the bottle with you to use till my return; only be careful to reserve enough for me." — Harvey had a wedding dinner next day, and introduced the sauce, which gave so much satisfaction that several smaller parties were made up, and the bottle, as a matter of course, was soon exhausted. On his return, the Captain "called for his steak, and called for his sauce," and on Harvey apologising, he said, "Never mind; I can make some more from my mother's receipe; and by-the-by, I will give you a copy of it." And he did so. Harvey then made it in large quantities, sent it to the principal oil-shops in London, and advertised it as "Harvey's Sauce," and by its extensive sale realised a large income. He subsequently sold the receipe for an annuity of £400 or £500 a year, and which he received regularly for the remainder of his life. The veteran Captain gave me a copy of the receipe for my own use, on honor not to divulge it lest it should invalidate or injure Harvey."
Sources of Information
-  Google Books