Geological map of Southern Pembrokeshire / 
De la Beche, Henry Thomas.
Cross, Joseph.
[London :  Geological Society of London, 
1829]
"Josh. Cross sculp.".
In: De la Beche, H.T. On the geology of south Pembrokeshire. (Transactions of the Geological Society of London. 2nd series; vol. 2, 1829. Pl. 1).