Which preposition to use with abajo

of Occurrences 2%

According to Agius ("Memoria," 1871), in the European market the Manila tobacco was admitted to be without any rival, with the sole exception of the Vuelta abajo of Cuba; and most certainly in the Asiatic and Oceanic ports its superior quality was undisputed, as the Havana tobacco loses its flavor on the long voyage to these countries; but now, from year to year, it is surely losing its reputation.

Which preposition to use with  abajo