A Military Writer's Handbook
Punctuation

Brackets

Use brackets [ ] in quotations when you need to insert a word that does not appear in the original in order to make a reference clear or to alter the grammar of the quotation to fit with your own sentence. Brackets in quotations are most frequently used to alter the tense of a verb or case of a pronoun in the original.

Captain Ramsay Park wrote in his war diary, "A small rear party of seven officers and 24 other ranks [would be] remaining to deal with the case of C-5292 Pte. Pringle, H.J., sentenced to die by being shot, on a charge of murder."
(Writing in the present tense, Capt Park would have used the verb "are" in his diary entry.)

Sometimes a noun or pronoun in the quotation needs some clarification. A brief defining phrase can then be inserted into the quotation in brackets. In the example below, the student is quoting from a novel in an English essay:

Sherston asks, "How could one connect [the front line soldier] with the gross profiteer whom I'd overheard in a railway carriage remarking to an equally repulsive companion that if the War lasted another eighteen months he'd be able to retire from business?" (247).
(The original had the word "him" where the bracketed phrase appears.)

If a word is misused or misspelled in a quotation, and you deem it necessary for the sake of scholarly accuracy to indicate to the reader that you are aware of the error, the Latin term sic (meaning "in this manner") may be inserted into the text in brackets. The example below appears in a history text that cites a letter by a Canadian war bride, who makes some pronounced spelling and sentence structure errors:

We landed in Tilbury England and were taken to a small hotel somewhere on the outskirts of London. There we cleaned up and stood in line first for the washroom and the bath and then for our meal. It was all done in Army style, not very luxurius [sic]. The next day, we entered the train in London which was to take us to Liverpool. It was a very long trainride [sic] in old trains, the people were friendly, the food was terrible.

Help! Do not use [sic] to belittle a writer you are quoting or to call attention to stupid mistakes. If there are spelling or usage errors in a passage you wish to use in an essay, consider paraphrasing the point before you decide to quote directly and use [sic]. You risk being considered snobbish.

Brackets should only be used when necessary, to avoid confusion or to avoid committing a grammar error.