The engraving, the largest of its kind produced at the time, depicts pilgrims arriving for Hajj. It carries an estimate of £12,000-£18,000. Courtesy Sotheby's 
The engraving, the largest of its kind produced at the time, depicts pilgrims arriving for Hajj. It carries an estimate of £12,000-£18,000. Courtesy Sotheby's 

Rare Kaaba engraving and early photographs of Egypt head to auction in Sotheby’s sale