An expedition to trace the footsteps of Cornish explorer Richard Lander is being highlighted in Truro on Saturday.
Richard Lander discovered the source of the River Niger in 1830
It is part of celebrations to mark the 200th anniversary of Lander's birth in the city.
Richard Lander discovered the source of the River Niger in West Africa in 1830.
It earned him an audience with King George IV and a monument was later built in Truro in his honour.
To mark the anniversary of his birth in 1804 and to celebrate his achievements, the Metropolitan Police Expedition Society will trace his 800-kilometre (497-mile) route along the River Niger in November.
"He is a fantastic man," said Megan Lander, his great great granddaughter.
"The achievements of him and his brother John are quite amazing.
"So many people have forgotten who he was and what he did and yet he is a household name in Nigeria."
Lander died on his third West African trip, killed along the Niger River by African tribesmen on 6 February 1834.
The expedition will be accompanied by one of Lander's direct descendants and their journey will conclude with a visit to his grave.
The Society is in Truro to give a presentation on the trip and answer questions from members of the public.
Steve Dunstone, from the Society, said it was "an anomaly" that Lander was not better known in the UK.
"The people of Nigeria know about Richard Lander.
"It seems ironic that his story is part of the education in Nigeria and not in this country."