Two articles by Dr.P.S.Brown [no relationship!] are available on line through the website www.pubmedcentral.nih.gov. These articles reprinted from Medical History magazine date back to the 1980's and are sympathetic to the herbalists and the advocates and users of herbal medicine and their ongoing fight against medical orthodoxy and the pharmaceutical industry.
"Herbalists and Medical Botanists in Mid-Nineteenth-century Britain with special reference to Bristol.' http://www.pubmedcentral.nih.gov/picrender.fcgi?tool=pmcentrez&artid=1139220&blobtype=pdf
"The Vicissitudes of Herbalism in late nineteenth and early twentieth century Britain."
The second article is probably of more general interest. There are references to Mrs.Leyel and the Society of Herbalists and several references to Herbal Review magazine.
Of particular interest is reference to Herbal Review, 1980, No.5 pages 12 to 15. I recall reading it back in, well, 1980. It is an extract from the memoirs of Albert Orbell FNIMH. Mr.Orbell, who was for many years editor of Health from Herbs magazine and for many years ran a well regarded practice in Ilford, Essex, talks of his 'apprenticeship' to a herbalist in the East-end of London.on of his duties was mixing herbal smoking mixture in the loft over the shop.unfortunately Mr.Orbell died before completing his Memoirs, thus they were never published in full.
In the first article there are several references to William Fox,the nineteenth century Sheffield herbalist. I recall Debs mentioning in one of her posts that she recently obtained one of his books.
[Edited to add direct links to the two articles]