Volkovo Cemetery
In 1887 he left Australia and returned to St Petersburg to present his work to the Imperial Russian Geographical Society, taking his young family with him. Miklouho-Maclay was in poor health and, despite treatment from Sergei Botkin, Miklouho-Maclay died of an undiagnosed brain tumour, aged 41, in St Petersburg. He was buried in the Volkovo Cemetery, and left his skull to the St Petersburg Military and Medical Academy.