The Sun now rose upon the right:
Out of the sea came he.
—Coleridge.
And haply the Queen Moon is on her throne,
Clustered around by all her starry Fays.
—Keats.
Britannia needs no bulwarks,
No towers along the steep;
Her march is o'er the mountain waves,
Her home is on the deep.
—Campbell.
This is not exclusively a poetic use. In ordinary speech personification is very frequent: the pilot speaks of his boat as feminine; the engineer speaks so of his engine; etc.
Effect of personification.
In such cases the gender is marked by the pronoun, and not by the form of the noun. But the fact that in English the distinction of gender is confined to difference of sex makes these departures more effective.
NUMBER.
Definition.
35. In nouns, number means the mode of indicating whether we are speaking of one thing or of more than one.
36. Our language has two numbers,—singular and plural. The singular number denotes that one thing is spoken of; the plural, more than one.