O Solitude! if I must with thee dwell, Let it not be among the jumbled heap Of murky buildings; climb with me the steep,—

Blue! ‘Tis the life of heaven,–the domain Of Cynthia,–the wide palace of the sun,– The tent of Hesperus and all his train,–

The bosomer of clouds, gold, grey and dun. Blue! ‘Tis the life of waters–ocean And all its vassal streams: pools numberless

The stars look very cold about the sky, And I have many miles on foot to fare.

Nature’s observatory—whence the dell, Its flowery slopes, its river’s crystal swell, May seem a span; let me thy vigils keep

May rage, and foam, and fret, but never can Subside if not to dark-blue nativeness.

Yet feel I little of the cool bleak air, Or of the dead leaves rustling drearily,

’Mongst boughs pavillion’d, where the deer’s swift leap Startles the wild bee from the fox-glove bell.

Or of those silver lamps that burn on high, Or of the distance from home’s pleasant lair:

But though I’ll gladly trace these scenes with thee, Yet the sweet converse of an innocent mind,

For I am brimfull of the friendliness That in a little cottage I have found;

Of fair-hair’d Milton’s eloquent distress, And all his love for gentle Lycid drown’d;

Whose words are images of thoughts refin’d, Is my soul’s pleasure; and it sure must be

Blue! gentle cousin of the forest green, Married to green in all the sweetest flowers,

Forget-me-not,–the blue-bell,–and, that queen Of secrecy, the violet: what strange powers

Almost the highest bliss of human-kind, When to thy haunts two kindred spirits flee.

Of lovely Laura in her light green dress, And faithful Petrarch gloriously crown’d.

Hast thou, as a mere shadow! But how great, When in an Eye thou art alive with fate!

Keats's personal copy of Paradise Lost. There are copious notes on every page. In the Romantic era marginalia were seen as a form of literary expression.

On one page Keats writes: "the light and shade, the sort of black brightness - the thousand melancholies and magnificences of this page - leaves no room for anything to be said thereon but: 'so it is.'" < Someone needs to write a PhD on this.