London Street Listings Index in 1921.
Here is Fish street Hill in 1842 and again in 1856 to compare - street numbering does not change much
Fish street hill (EC3) (City) Monument station to 128 Lower Thames street (passing the Monument)
West side
Metropolitan & District Railways, Monument Station
13 Sheldon G & Co, wine merchants
13 Evans, Gray & Hood, spice merchants
13 O'Hara & Hoar, colour importers
13 Era Trading Co
13 Sandy Hill Manufacturing Co Ltd, cleaning powder manufacturers
13 Lench Thomas William Ltd, bolt & nut manufacturers
13 Boden Horace & Co, shipping agents
13 Shipping & Forwarding Ltd
13 Monument Chemical Co
14 Ray M A & Sons, coal merchants
15 Lench T W Ltd, bolt & nut manufacturers
15 Simson & Co Ltd, manufacturing stationers
15 Duttson William & Co, saccharine manufacturers
15 Owen Eustace & Son, cartage contractors
16 Hockey Oliver, provision merchant
16 Sherwood Colliery Co Ltd
16 Drysdale J W & Sons, aniline dye manufacturers
... here is Monument street ...
17 Minnitt Herbert William & Son, Fishmongers
17 Canadian Pacific Fisheries, frozen fish importers
18 & 19 Hancock Collis & Co, paper bag makers
18 & 19 Waghorn James & Co, auctioneers
20 Marler William Edwin Thomas,
beer retailer
21 Joel Barnett, cartage contractor
26 Whitstable Oyster Fishery Co
27 Evans Thomas William, newsagent
28 Incorporated Joint Committee on Water Regulations, W R E Coles, sec
28 Sanitary Inspectors Examination Board, W R E Coles, hon sec
... here is Lower Thames street ...
East side
33 Rocco Brothers, refreshment rooms
33 Proctor John, printer
34 Collins & Co, dairyman
... here is Kings Head court ...
34 Pain Charles, machine ruler
35 Fish Frederick Charles, poultry merchant
36 Britannia,
Morris D Jesky
37 Palumbo Pasquale & Sons, dining rooms
38 Mitre Hotel
PH, Francis Davis
39 Sutton Gerald, fish salesman
39 Bull William & Co, fish salesmen
40 Sandford Rd Thomas, fish salesman
... here is the Monument & Monument street ...
42 Master Sydney John, dining rooms
42 Wickelgreen Albert E, hairdresser
42 Kadelburg, Tsivoglou & Co, merchants
43 Gardner John Toulson, fishmonger
44 Gardner John Toulson, dining rooms
45 Gardner John Toulson, bakehouse
46 Dexter Walter Stephen, bookseller
46 Acratopulo Spiridon Anthony & sons, commission merchants
46 Morales Andreis, fruit importer
46 Palmer H G & Co, tea tasting requisites
46 Lewis George, Accountant
46 Thomson Hugh, wine merchant