Ernst Stromer

On 7 November 1910, Stromer arrived in Alexandria, Egypt, aboard the Norddeutscher Lloyd steamship Cleopatra. After a two-day setback imposed by a temporary quarantine, the expedition set out by train to arrive in Cairo the next day.

After checking into the hotel in Cairo, Stromer found a letter of welcome waiting for him at the post office from the director of the Geological Survey of Egypt. Stromer visited the office of George Steindorff, a reputable German Egyptologist, as a matter of courtesy and to plan the future expedition.

On 14 November, Stromer went to meet with John Ball, the founder of the Desert Survey Department of the Geological Survey of Egypt. In that year, the survey had published the first topographic map of Egypt and was finishing a geological map that was to be published in 1911. Both sources were invaluable to Stromer, now planning his upcoming expedition to Bahariya, an area of the Western Desert that was little known.

Richard Markgraf, a German guide who lived South of Cairo, met Stromer during the winter of 1901–1902 and got along very well. Markgraf was Stromer's Sammler, or fossil collector, for 10½ years, and became Stromer's friend. Markgraf, however, was often ill. It is unclear whether the cause was malaria, intestinal bleeding from typhoid, or chronic amebic dysentery.

The plan for the expedition contained three parts; first, Stromer and Markgraf would travel northwest from Cairo to Wadi el Natrun. After exploring the area for a few weeks, they would return to Cairo, replenish their supplies, and afterward head south to Luxor to explore the eastern slopes of the Nile Valley. The last part of the expedition would be spent exploring the Bahariya Oasis.

Stromer and Markgraf began the expedition with the goal of discovering fossil mammals to support Stromer’s theory of an African origin of humanity.

Stromer's 1910 journals from Wadi el Natrun reveal that he worked all through the day, hiking for miles, climbing hills, and hammering pieces of rock from outcroppings throughout the valley. He discovered sharks' teeth, broken shells of ancient turtles, and the occasional jaw of a prehistoric crocodile. Despite these discoveries, his failure to uncover ancient mammals left him disappointed and he returned to Cairo.

Markgraf, who stayed in Wadi el Natron after Stromer’s return to Cairo, discovered the skull of Libypithecus markgrafi.

The second stage of the expedition took them to a location far up the Nile in December. This location yielded little success.

The third stage of the expedition was delayed due to Markgraf becoming ill and being unable to proceed to the Bahariya Oasis. Stromer found a dragoman who could function as a guide and translator.

On 3 January 1911, the expedition left for the Western Desert. The caravan was significantly slowed as they had to find grazing areas for the camels because one of the team members hadn’t bought fodder for the animals.

After more than a week of walking, they arrived in the Bahariya Oasis on January 11, 1911. Due to the inaccuracy of the understanding of the geologic history of the Bahariya Oasis in 1911, Stromer erroneously believed the oasis to date to the Eocene rather than Cretaceous.

On 14 January, the weather eased and the expedition was able to begin. That first day, Stromer was able to find a fossilized shark vertebrae, fish teeth, and some petrified wood. On January 18, he found "three large bones which I attempt to excavate and photograph. The upper extremity is heavily weathered and incomplete [but] measures 110 cm long and 15 cm thick. The second and better one underneath is probably a femur [thighbone] and is wholly 95 cm long and, in the middle, also 15 cm thick. The third is too deep in the ground and will require too much time to recover." He also discovered that morning an ischium (one of the pelvic bones of a dinosaur), another vertebrae with "a convex end," and what he described as "a gigantic claw". He cut up his mosquito netting and soaked them in a flour and water paste, covering the two larger bones in this wrapping.

An illustration by Stromer detailing the neural spines of Spinosaurus

He moved the expedition to the area near Gebel Hammad the next day. Several dinosaur, fish, and shark bones were found there, but after little more was recovered, they packed up and, two days later, left for the village of Ghauraq.

On 18 February 1911, Stromer began his long trip back to Germany where he would describe his finds including the large spinosaurid, Spinosaurus aegypticus, and the carcharodontosaurid, Carcharodontosaurus saharicus.