One of the most important late 19th century travelers to Yemen was the Austrian Eduard Glaser, who commented on life in the Ottoman era and collected South Arabian inscriptions and antiquities. His work is archived in several places in Vienna. In the Kunsthistorische Museum there is a small collection of South Arabian art that he collected. I visited this last week and provide several pictures of what can be seen.
The Glaser Collection in the museum
A project is underway to provide open access to the squeezes that Glaser made of South Arabian inscriptions.