Avoid all pronouns and other words that are not essential to the meaning.
“The father he died, the mother she soon followed after, and the children they were all taken down sick.”
“Let every one turn from his or her evil ways.” Unless there is special reason for emphasizing the feminine pronoun, avoid the awkward expression his or her. The pronoun his includes the other.
Mixed Pronouns
Do not use two styles of the pronoun in the same Sentence. “Enter thou into the joy of your Lord.” “Love thyself last, and others will love you.”
It should not be necessary to caution the reader against the use of them for those.
“Fetch me them books.” “Did you see them, fat oxen?” “Them’s good; I’ll take another dish.”
Which, Who
“Those which say so are mistaken.” Who is applied to persons; which, to the lower animals and to inanimate things.