G is used before h, l, and r.

H.

H is a note of aspiration, and shows that the following vowel must be
pronounced with a strong emission of breath, as hat, horse.

It seldom begins any but the first syllable, in which it is always sounded
with a full breath, except in heir, herb, hostler, honour, humble, honest,
humour and their derivatives.

It sometimes begins middle or final syllables in words compounded, as
blockhead; or derived from the Latin, as comprehend.

J.

J consonant sounds uniformly like the soft g, and is therefore a letter
useless, except in etymology, as ejaculation, jester, jocund, juice.

K.

K has the sound of hard c, and is used before e and i, where, according to
English analogy, c would be soft, as kept, king, skirt, skeptick, for so it
should be written, not sceptick, because sc is sounded like s, as in scene.

It is used before n, as knell, knot, but totally loses its sound in
modern pronunciation.

K is never doubled; but c is used before it to shorten the vowel by a