Analysis of Happy streams, whose trembling fall

Happy streams, whose trembling fall,
With still murmur softly gliding,
Happy birds, whose chirping call,
With sweet melody delighting,
Hath mov’d her flinty and relentless heart,
To listen to your harmony,
And sit securely in these downs apart,
Enchanted with your melody.
Sing on, and carol forth your glee,
She grants you leave her rays to see:
Happy were I, could love, but so delight her!
But Ah! alas! my love doth still despite her.