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Evans Sons Lescher and Webb of 56 Hanover Street, Liverpool and 60 Bartholomew Close, London, EC1; and at New York. (1922)
Evans' Pastilles of 56 Hanover Street, Liverpool.
1902 Evans, Sons, Lescher and Webb was incorporated as a public company by merging Evans, Lescher and Webb of London with the related business of Evans, Sons and Co of Liverpool. Evans, Sons, Lescher and Webb was registered on 17 October, to acquire certain businesses of wholesale and export druggists. 
In 1907, the company began to make biological medicines for humans and animals; these included sera and antitoxins for diphtheria, tetanus and meningitis. It worked closely with Liverpool University Medical School, with whom it jointly administered the Incorporated Liverpool Institute of Comparative Pathology at Runcorn.
The company took over the Institute as a branch when the latter was faced with closure in 1911.
1916 the firm established a works for the manufacture of fine chemicals at Runcorn.
1922 Listed Exhibitor. Manufacturers of Fine Chemicals; Drugs; Pharmaceutical and Toilet Preparations; Vaccines; Pills; Tablets, etc. (Stand No. A.9) 
1929 The Runcorn Institute became the Evans Biological Institute.
1943 The Liverpool headquarters was destroyed by enemy action. After that the firm progressively developed new manufacturing and research facilities at Speke, near Liverpool, where it is now based.
Evans, Sons, Lescher and Webb were also active in the supply of cameras, probably resourced from the well-known Liverpool firm of Sharp and Hitchmough, i.e. The Barts, a wood and brass field camera, and the Mersey No.6, a box form camera.