This Central Hospital (koeliehospitaal) of the Sumatra Caoutchouc Plantage Mij te Batang Toroe (Tapanoelie) was established in 1915. P.Leendertz published a thesis in 1921 about his observations during the period 1915 to 1920 made in the coolie hospital at Batang Toru. See also the report of Governor General Tjarda van Starkenborgh Stachouwer on his voyage to Sumatra, made in March 1940. The medical doctor of the company then was Brenkmann.
Batang Toroe was situated in the Residency Tapanoeli on the Westcoast of Sumatra. It was a very mountainous area with a few rivers, among which the Batang Toro.(Gonggrryp 1934, 1389).