The maps were acquired for the Egerton Collection in 1895, published in facsimile form in 1911, and are now held by the British Library in London, England.

[3] Each portolan features a central 32-wind compass rose, but its windrose network lacks the usual ring of 16 vertices, and is imprecisely drawn.

'[10] Arthur Davies concluded the atlas 'provides in its charts of the world the first complete and up to date summary of Portuguese and Spanish explorations to that time.

'[11] Stevenson notes a 'striking resemblance' of the Indian subcontinent and Far East charts to relevant portions of the Cantino, Canerio, and Waldseemüller Carta Marina maps.

'[12] Simonetta Conti similarly notes, 'it is clear that they [the mapmaker] must have been very familiar with the work of the Padron Real 's first authors, as can be seen from the large number of toponyms stretching from the area near Yucatan to the lands of Santa Cruz.