(3) Letters; which also may either be placed within parentheses or be printed in "superior" form: (a), (b), (c), &c., or a b c, &c. Italic letters are sometimes used. As a rule the first note in each page is marked (a) or a. If in one page there are more notes than there are letters in the alphabet (which sometimes happens), we go to (aa), (bb), (cc), &c., aa bb cc. The letter "j" is often omitted.
It is less common to make the letters continuous from page to page.
The sign, whatever it may be, is placed at the beginning of the note, and also in the text immediately after the part to which the note refers. The note may refer to a whole sentence, to a part of a sentence, even to a single word; the sign is placed as the case may be, at the end of the sentence, at the end of the part referred to, or after the single word.
HOW TO CORRECT A PRINTER'S PROOF
EXPLANATION
1. Where a word is to be changed from small letters to capitals, draw three lines under it, and write caps. in the margin.
2. Where there is a wrong letter, draw the pen through it, and make the right letter opposite in the margin.