The Catalpa Memorial commemorates the historic escape of six members of the Irish Republican Brotherhood (Fenians) from Fremantle Prison in 1876 .
The Catalpa rescue was the escape, on 17–19 April 1876, of six Irish Fenian prisoners from the Fremantle Prison. They were taken on the convict ship Hougoumont to Fremantle, Western Australia, arriving 9 January 1868. In 1869, pardons had been issued to many of the imprisoned Fenians. Another round of pardons was issued in 1871, after which only a small group of "military" Fenians remained in Western Australia's penal system.
In 1874, prisoner James Wilson secretly sent a letter to New York City journalist John Devoy, who worked to organize a rescue. Using donations collected by Devoy from Irish-Americans, Fremantle escapee John Boyle O'Reilly, then living in Boston, purchased a merchant ship, Catalpa, and sailed her to international waters off Rockingham, Western Australia. On 17 April 1876 at 8:30 am, Wilson and five other Fenians working outside the prison walls, Thomas Darragh, Martin Hogan, Michael Harrington, Thomas Hassett, and Robert Cranston, boarded a whaleboat O'Reilly had dispatched, were taken aboard Catalpa, and escaped to New York.
