HMS Investigator (1861)
 HMS Investigator was a wooden paddle survey vessel of the Royal Navy built to carry out an expedition on the Gabon River in Africa.Investigator was laid down on 15 June 1861 at Deptford and was launched on 16 November 1861. She was initially commanded by Lieutenant Benjamin Langlois Lefroy off the west coast of Africa. He was succeeded by George Truman Morrell in 1865 under whose command she sailed up the River Niger making contact with local tribes.