Many errors consist in the omission of a single letter in a single word, altering the sense most materially. Thus, an omission of the letter _t_, in a work by Dr Watts, made immortal into _immoral_; and other grotesque instances of this kind of error could be given. The heedless substitution of one letter for another, without exceeding or falling short of the proper number of letters in the word, is a very frequent form of blunder. ‘Bring him to look’ is a poor version of ‘bring him to _book_.’ A candidate at an election certainly did not mean, as a newspaper implied, that he fully expected to come in ‘at the top of the _pole_.’ A compositor, perhaps a learner, being unable to make out a Greek word of three letters, set them down as the three numerals to which they bore some resemblance in shape, namely 185. At a public demonstration the mob rent the air with their _snouts_. Dr Livingstone’s cap, as worn when Mr Stanley met him in the heart of Africa, was said in one of the papers to have been ‘_famished_ with a gold-lace band.’ In old English printing, the syllable _con_ was often contracted to something like the shape of the figure 9; and this numeral is to be found in many books, even standard works, where it has no right whatever; in one edition of the _Monasticon Anglicanum_ for instance, the word conquest is represented as _9quest_. There are both a wrong letter used and a letter omitted in the startling statement, that a right reverend prelate was highly pleased with some ecclesiastical _iniquities_ shewn to him.