[1] In 1861, he was assigned to visit the region of Arabia from Medina to the port of Al Wajh and conduct a detailed survey.

[3] Again he brought a camera, becoming the first person to photograph Mecca, the Great Mosque, the Kaaba, and pilgrim camps at Mina and Arafat.

As part of the Hajj which is one of the Five Pillars of Islam, pilgrims perform rituals at Mecca and other nearby sites.

He presented an album of twelve photographs at the 1881 Third International Conference of Geographers in Venice, winning a gold medal.

[8] The curator Claude Sui describes Sadiq's achievements in photography as very significant: "[T]he sheer quality of his photographs is evidence of his talent in this field and reveals professional standards in his handling of the wet collodion procedure".

[1] His photography reflects both a cartographer's awareness of spatial relationships[3] and a devout Muslim's connection to the region, culture, and people.

[2] His other publications include:[9] All his books combine photographs and written advice for Hajj pilgrims based on his repeated visits to the area.