Admiral William Brown in the Forum (Lyrics link for other people).

Sorry, I don't know who wrote the song. There are several sites on Admiral William Brown himself.

Catholic Encyclopedia: William Brown

William Brown> (Foxford, Mayo site)

THE LIFE OF ADMIRAL WILLIAM BROWN (1777 - 1857) (Irish Stamps Online)

Bibliographic info (from HERE):

Guillermo Brown, Memorias del Almirante Brown (Buenos Aires: Academia Nacional de la Historia, 1957). Documents from Argentina's Naval Archives published by National Commission of Homage to Admiral William Brown on the centenary of his death. Includes account by Brown of his controversial privateering raids in the Pacific, 1815-1816, with his brother M. Mac Brown and Captain Hipolito Bouchard.

~Masato