Alexander H. McGuffey, McGuffey's Eclectic Spelling Book
“ The Mutes are those consonants that admit of no sound without the aid of a vowel. They are b, d, k, p, q, t, and c and g hard.The Semi-vowels are those consonants that can be sounded imperfectly by themselves. They are f, h, j, l, m, n, r, s, v, x, z, and c and g soft.Four of the semi-vowels are called LIQUIDS; viz., l, m, n, and r. They are called liquids because they unite so readily with other sounds, or flow into them.OF SYLLABLES AND WORDS. A Syllable is a sound, or a combination of sounds, uttered by a single impulse of the voice: it may have one or more letters; as a, bad, bad-ness. ”
