Threemaster

At the end of Proteus Stephen looks back over his shoulder and sees the masts of a sailing ship floating into Dublin on the flood tide: "Moving through the air high spars of a threemaster, her sails brailed up on the crosstrees, homing, upstream, silently moving, a silent ship."

John Hunt 2015

The south side of the South Wall at high tide. A ship is visible in the distance, either coming into Dublin or leaving it via the extended mouth of the River Liffey that lies to the left of the rocks. Source: livetofivehundred.wordpress.com.

2009 photograph by Donaldytong of the ship Jeanie Johnston moored in the River Liffey, with "her sails brailed up on the crosstrees." Source: Wikimedia Commons.

View east along the South Wall, looking out to the Poolbeg lighthouse. The extension of the River Liffey formed by the wall is to the left, and a ship is visible in Dublin Bay at the far right. Source: livetofivehundred.wordpress.com.