Complex sentence: At Cairo he gained the support of the Mamluk ruler, Ali Bey; after visiting Thebes (where he entered the tomb of Ramesses III, KV11) he crossed the desert to Kosseir, where he embarked in the dress of a Turkish sailor.
Split into simpler sentences: At Cairo he gained the support of the Mamluk ruler, Ali Bey. After visiting Thebes, where he entered the tomb of Ramesses III, KV11, he crossed the desert to Kosseir, where he embarked in the dress of a Turkish sailor.