Those piles, among the clouds at home.

I have understood molem generally of the buildings of Rome, not specially of Maecenas' tower. The parallel passage in Virg. Aen. i. 421—

"Miratur molem Aeneas, magalia quondam,
Miratur portas strepitumque et strata viarum"—

is in favour of the former view.

What once the flying hour has brought.

I have followed Ritter doubtfully. Compare Virg.
Georg. i. 461,—

"Quid vesper serus vehat."

Shall waft my little boat ashore.

I have hardly brought out the sense of the Latin with sufficient clearness. Horace says that if adversity comes upon him he shall accept it, and be thankful for what is left him, like a trader in a tempest, who, instead of wasting time in useless prayers for the safety of his goods, takes at once to the boat and preserves his life.

BOOK IV, ODE 2.