[9] Special Reports, pp. 82, 240.
[10] Ibid., pp. 87, 240. For 8,966 no returns were made.
[11] On the subject of lip-reading, see especially E. B. Nitchie, "Lip-Reading: its Principles and Practice", 1912.
[12] This "sign language" is referred to at somewhat more length in [Chapter XIX].
[13] Sometimes called "the deaf and dumb alphabet".
[14] Special Reports, pp. 89, 240. For 2,365 no returns were made.