fig. 23 – sketch of Rockall on the 81st page in the book A Vertebrate Fauna of the Outer Hebrides (J. A. Harvey-Brown & T. E. Buckley, 1889
fig. 23 – sketch of Rockall on the 81st page in the book A Vertebrate Fauna of the Outer Hebrides (J. A. Harvey-Brown & T. E. Buckley, 1889