Per email from Sue Bird 07/11/2021: "Moving onto the very last section of the Geography Teaching Collection - plant associations. This is quite a long e-mail as I have been doing quite a bit of delving.
As you know Flatters & Garnett were in Dover St., Manchester between 1906 & 1913. In their 1911 catalogue they announced that they "are pleased to announce that they have been appointed sole Agents [ for the Crump series], and all orders and enquiries should be addressed to them.
That catalogue also gives the following information:- "The slides comprising this Section are from a unique series of photographs by Mr W.B. Crump, M.A., who was one of the first to publish an account of the Plant Associations of any district in this country. They illustrate the characteristics of the most important associations. They are in use at the Botany and Geography Schools of Oxford, Cambridge and Liverpool Universities, and have been supplied to numerous Secondary Schools and Education Committees."
In 1913 the journal 'Knowledge' reviewed this series :- "the British Plant Associations photographed by Mr. W. B. Crump (Messrs. Flatters and Garnett) are excellent, and should prove extremely useful to lecturers who have not the opportunity of making their own slides, or who wish to fill up gaps in their series"
The above means that all the images in the Crump series are by W.B. Crump :- William Bunting Crump, 1868-1950.
I have seen a 1912 book (The story of our trees) where in the Appendix on diagrams & lantern slides the following appears:- " the following firms have lantern slides on the market: W.B. Crump 4 Marlborough Avenue, Halifax – Yorkshire woodlands, etc. [with a separate entry for Flatters].
I'm not sure when Crump moved into 4 Marlborough Rd as he wasn't there in 1901. I also know that he married in the summer of 1907 and that his children were: William P, born and died Autumn 1911 and Barbara Autumn 1912 (she is described as a 'Lady Gardener' in 1939). I do wonder if his family life prompted him to appoint Flatters & Garnett as the agents for his images.
I have also discovered that "The Crump Collection of Lantern Slides, Prints and Negatives of British Vegetation [Journal of Ecology v.21 Aug 1933, p.488 ] were donated to the British Ecological Society in Feb 1933 ; Mr. W. B. Crump, of Leeds, has presented his collection of lantern slides, prints and negatives of British vegetation to the British Ecological Society. (some 200) Mr. Crump was one of the pioneers in the study of vegetation in this country in the last decade of the nineteenth century, and later a member of the British Vegetation Committee, from which the British Ecological Society sprang. Many of the photographs were taken in the northern counties. The collection is at present housed at the Dept. of Botany, Botanical Garden, Oxford by Mr. Crump’s desire". This makes it an interesting connection to the Plant Sciences Dept. (which was created by the merger of the Dept. of Botany, The Forestry Institute and part of the dept of Agriculture)."
Per email from Sue Bird 15/11/2021: "...the 1911 Flatters & Garnett catalogue
The numbers in the series BB29 all agree with the Geography numbering of the Crump series.
Given that we have discovered a considerable overlap with the Crump images in Plant Sciences (even though Flatters had renumbered the series as BB23 by the time of the 1924 catalogue as well as renumbering the actual images due to an increase in the size of the series) I'm afraid that we can say that all of the Geography ones are 'no later than 1910'
I've also started looking at the Cash Account books for Geography & I note that on 30th Dec. 1910 Flatters were paid £5 for slides & again on 6th Feb 1911 Flatters were paid £10 6/1d for slides - neither set being recorded in the acquisition books. At 1/3d each or 15/- the dozen that makes 2 orders for 48 slides (4 dozen = £5) and 100 slides (£10 5/-) which would be the bulk of the Crump slides'
So again no later than 1910 fits."