66. _How many forms have letters?_
Two.

67. _What are they?_
Small letters and Capitals.

68. _What are the Natural Divisions of Consonants?_
Subvocals and Aspirates.

69. _What are Subvocals?_
Those Consonants which produce an undertone of voice when their
sounds are uttered.

70. _Name the Subvocals._
B, D, G hard; J and G soft; L, M, N, R, V, W, Y, Z, Zh, and Ng.

71. _What are Aspirates?_
Mere whispers made by the organs of speech and breath.

72. _Name the Aspirates._
C, F, H, K, P, Q, S, T, X, Ch, Sh, and Wh.

73. _What Combination is both Aspirate and Subvocal?_
Th.

74. _What are Cognate letters?_
Those which are produced by the same organs of speech in a similar
position.