And then I saw the real thing in the Manuscripts section of the Library. Two bracelets belonging to a member of the Trollope family, possibly Fanny, were enclosed in a box, alongside other containers holding a painted miniature, a watch and several private letters.
In the case of both bracelets, the clasps are made of metal and are the part that gives the jewellery weight. The straps, made of intricately braided hair, appear like very fine metal thread. It's the lightness and elasticity of the strap, and a few rogue hairs that have freed themselves that reveal that it is hair.See one of the pen and ink results below.
The drawing was named after the old belief that tangled hair was deliberately knotted by Queen Mab and her elves and would bring the wearer bad luck. As a result 'bed head' was then known as 'elf locks'.