Passage: He was a co-founder of the "International Committee for Relief to the Wounded", which became the International Committee of the Red Cross after 1876. In 1864 he took over the position of President of the Committee from Guillaume-Henri Dufour, and he was also a major rival of the founder Henry Dunant. During his record long term of 46 years as president he did much to support the development of the Committee in the first decades after its creation.

Question: Who did he take the President position from in 1864?
Guillaume-Henri Dufour