Robertson and Beato were joined by Beato's brother, Antonio on photographic expeditions to Malta in 1854 or 1856 and to Greece and Jerusalem in 1857.
Robertson a Beato vzali so sebou Beatovho brata Antónia na fotografickú expedíciu na Maltu v roku 1854 alebo 1856 a do Grécka a Jeruzalema v roku 1857.