 He published his reminiscences of his first voyage of 1883/4 when he traveled to Europe, Great Britain, United States of America, Canada, Japan, China, Straits Settlements, and northern portions of India.Some of his subsequent voyages took him to more isolated regions, including the Society Islands, Fiji, Falkland Islands, Tierra del Fuego, upper Amazon, Argentina, Uruguay, Yukon, upper Manchuria, Borneo, Nova Zembla and Spitsbergen.Kothari was also a member of the Royal Society of Arts and North British Academy of Arts, Life Governor of the Royal Masonic Institution for Boys and Royal Masonic Institution for Girls, Honorary Special Magistrate in Karachi since 1892, member of the Cantonment Committee in Karachi since 1890 and Municipal Committees in Karachi since 1884, Lieutenant in the "Sind Volunteer Rifle Corps" since 1895, Life Governor of the Great Ormond Street Hospital and member of the Bombay Legislative Council  in 1911, fellow of the Royal Asiatic Society and vice-president of the Navy League.