Invoke thy aid to my adventurous song.
Again a few lines later,
That to the height of this great argument
I may assert Eternal Providence.
Ten lines farther we read of the Serpent
Stirr'd up with envy and revenge.
We have only an apparent elision of y a few lines later in his aspiring
To set himself in glory above his peers,
for the line would be ruined were the y to be omitted by a reader. The extreme shortness of the two unaccented syllables, y and a, gives them the quantity of one in the metre, and allows by the turn of voice a suggestion of exuberance, heightening the force of the word glory. Three lines lower Milton has no elision of the y before a vowel in the line,
Against the throne and monarchy of God.
Nor eight lines after that in the words 'day and night.' There is elision of y in the line,