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Rh in dispute—the power to distinguish colour. Even so ingenious a man as the Nicholas Saunderson already mentioned not only could gain no perception of colour himself, but used to say that "it was pretending to impossibilities." Mr J. A. Macy, who edited Miss Helen Keller's book, The Story of my Life—an experience that ought surely to have effaced the word "impossible" from his mind in connection with the blind—makes the bold statement: "No blind person can tell colour."

Three instances of those for whom this power has been claimed are all that can be included here. The reader must attach so much credibility to them as he thinks fit:

1. From Wilson's Biography, as ante:

"The late family tailor of Mr M'Donald, of Clanronald, in Inverness-shire, lost his sight fifteen years before his death, yet he still continued to work for the family as before, not indeed with the same expedition, but with equal correctness. It is well known how difficult it is to make a tartan dress, because every stripe and colour (of which there are many) must fit each other with mathematical exactness; hence even very few tailors who enjoy their sight are capable of executing that task. . . . It is said that Macguire could, by the sense of touch, distinguish all the colours of the tartan."

2. From the Dictionary of National Biography:

" (1800-1820), blind lady, was born at Liverpool of respectable parentage on 28 June 1800. She was of a sickly constitution, and became totally blind in June 1816. Her case attracted considerable attention from the readiness with which she could distinguish by her touch the colours of cloth, silk,