Which preposition to use with coracles

across Occurrences 1%

Ever since the Welshman paddled his coracle across Caernarvon Bay, and Saxon Alfred mused over the Danish galley wrecked upon his shore, each century has been adding new names of fame to the Vikings' bead-roll.

of Occurrences 1%

The whole party would have been destroyed but for the resourcefulness displayed by the leader, who made coracles of horse-hides stretched on frames of saplings, by which means they escaped.

Which preposition to use with  coracles