[2] In the summer of 1894, with Samuel Wide, he performed an archaeological excavation of the sanctuary of Poseidon on the island of Kalaureia.
[3] In the spring of 1902, with Johannes Boehlau, he conducted an archaeological dig on the site of the ancient city of Larissa in Asia Minor.
Findings from these excavations where submitted in the Athenische Mittheilungen (1895) and the Språkvetenskapliga sällskapets i Uppsala förhandlingar (1900–03).
[1] In 1932/34, with Johannes Boehlau, he returned to the excavation site at Larissa.
[4] He is largely known for his studies involving ancient art history and Greek mythology, in particular, Asklepios, Mythologisch-archäologische Studien (Asclepius, Mythological-archaeological studies, 1894–97).