OBS. 16.—The interjection may be placed at the beginning or the end of a simple sentence, and sometimes between its less intimate parts; but this part of speech is seldom, if ever, allowed to interrupt the connexion of any words which are closely united in sense. Murray’s definition of an interjection, as I have elsewhere shown, is faulty, and directly contradicted by his example: “O virtue! how amiable thou art!”—Octavo Gram., i, 28 and 128; ii. 2. This was a favourite sentence with Murray, and he appears to have written it uniformly in this fashion; which, undoubtedly, is altogether right, except that the word "virtue" should have had a capital Vee, because the quality is here personified.
OBS. 17.—Misled by the false notion, that the term interjection is appropriate only to what is “thrown in between the parts of a sentence,” and perceiving that this is in fact but rarely the situation of this part of speech, a recent critic, (to whom I should owe some acknowledgements, if he were not wrong in every thing in which he charges me with error,) not only denounces this name as “barbarous,” preferring Webster’s loose term, “exclamation;” but avers, that, “The words called interjection should never be so used—should always stand alone; as, ’Oh! virtue, how amiable thou art.’ ‘Oh? Absalom, my son.’ G. Brown,” continues he, “drags one into the middle of a sentence, where it never belonged; thus, ’This enterprise, alas! will never compensate us for the trouble and expense with which it has been attended.’ If G. B. meant the enterprize of studying grammar, in the old theories, his sentiment is very appropriate; but his alas! he should have known enough to have put into the right place:—before the sentence representing the fact that excites the emotion expressed by alas! See on the Chart part 3, of RULE XVII. An exclamation must always precede the phrase or sentence describing the fact that excites the emotion to be expressed by the exclamation; as: Alas! I have alienated my friend! Oh! Glorious hope of bliss secure!”—Oliver B. Peirce’s Gram., p. 375. “O Glorious hope of bliss secure!”—Ib., p. 184. “O glorious hope!”—Ib., p. 304.