The business consisted of a dispensing pharmacy in Plough Court managed by Allen and a laboratory in Plaistow, Essex managed by Howard.
Allen and Howard amicably dissolved their business in 1805 with each keeping their respective sections.
[1][2][3] As Howard's chemical manufacturing business grew, new premises were needed and he shifted the laboratory to City Mills, Stratford where it flourished over the 19th century becoming Howards and Sons in 1858.
Notable partners include John Eliot Howard, son of Luke Howard, who became a specialist in cinchona bark identification and quinine-related research, and Joseph Jewell (1763–1846).
Up until 1949, Howards and Sons existed with many subsidiaries not detailed here.