Serendipitous find

by Mrs E, whilst making room for the hoover in the cupboard under the attic stairs. This pamphlet, "Instructions in the Method of Taking Finger Prints, with a memorandum on the working of the Finger Print System of Identification"  was prepared at the Registry of Criminals, New Scotland Yard and published in 1932, price 6d net. I paid 5p for it in April 1973. 

And now I'm studying more recent, but fundamentally similar, techniques at FutureLearn.