AW/2/4/1
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Unidad documental simple
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1985
EN/3/4
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Unidad documental simple
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20 Jun 1911
Two sheets with envelope. Notes highlight where the subjects were confused by the different colours.
EN/1/7
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Unidad documental simple
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30 Sep 1907
Contains the result of a colour blindness examination on D.G Marshall and the coloured thread samples used
EN/1/6
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Unidad documental simple
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10 Aug-29 Dec 1907
Includes notes relating to the family geneology and tests undertaken for colour blindness on Leonard Behrens
EN/1/2
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Unidad documental simple
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5 Jan 1907
Includes colour thread samples, results and comment
EN/1/5
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Unidad documental simple
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25 Jul 1907
EN/1/3
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Unidad documental simple
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20 Jan-1 Nov 1907
Discusses test undertaken or planned relating to members of the Hill, Bridson, Dighton and Eastwood families
EN/3/2
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Unidad documental simple
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17 Oct-8 Nov 1907
EN/3/3
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Unidad documental simple
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1908
Notes on Hill family pedigree
EN/1/15
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Unidad documental simple
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27-30 Jan 1908
Includes coloured threads used for tests