As mentioned before, Philander is an arrogant, rude, mean, cruel, careless, and selfish man and has a maddeningly superior attitude. He behaves like he is the better scientist than Professor Porter when he clearly is not. He also seems to be a bit paranoid, as evidenced by his misguided belief that Porter had not returned from Africa because of a new discovery he made.
The Legend of Tarzan
On one occasion, he found Pellucidar yet his photographic proof about dinosaurs' existence was ruined by Manu photographing himself. He even tried to capture the silver ape, Mangani, who is known for his healing powers. Samuel even tried to capture Tarzan and his men mistook Archimedes as him. His humiliations reduced him to living in an apartment in Chicago constantly ducking the Landlord when he was visited by Edgar Rice Burroughs about what he knows about Tarzan.