In a bid to evade the authorities as the "SS Fanny" neared Ireland, Major Crawford purchased the "SS Clyde Valley" in Glasgow. On 19–20 April off Tuskar Rock, County Wexford, the entire cache of weapons was transferred from the "SS Fanny" onto the "SS Clyde Valley". On 24 April, the "SS Clyde Valley" was renamed the "Mountjoy II", with the use of strips of canvas painted with white letters on a black background. This referred to the "Mountjoy" that broke the boom across the River Foyle during the Siege of Derry in 1689, providing historic symbolism for unionists.