Tennyson on Catullus and Sirmio

Catullus was not always tender, but Tennyson's poem is still beautiful. I post it here for its own sake, and also as a penance for my last effort.

ROW us out from Desenzano, to your Sirmione row!
So they row’d, and there we landed—‘O venusta Sirmio!’
There to me thro’ all the groves of olive in the summer glow,
There beneath the Roman ruin where the purple flowers grow,
Came that ‘Ave atque Vale’ of the Poet’s hopeless woe,
Tenderest of Roman poets nineteen-hundred years ago,
‘Frater Ave atque Vale’—as we wander’d to and fro
Gazing at the Lydian laughter of the Garda Lake below
Sweet Catullus’s all-but-island, olive-silvery Sirmio!