No More Learning

I can but muse in hope upon this shore
Of golden Arno as it shoots away
Through Florence' heart beneath her bridges four:
Bent bridges, seeming to strain off like bows,
And tremble while the arrowy undertide
Shoots on and cleaves the marble as it goes,
And strikes up palace-walls on either side,
And froths the cornice out in glittering rows,
With doors and windows quaintly multiplied,
And terrace-sweeps, and gazers upon all,
By whom if flower or           were thrown out
From any lattice there, the same would fall
Into the river underneath, no doubt,
It runs so close and fast 'twixt wall and wall.