If you are speaking of Henry Morton Stanley, then no, he was not a missionary. He is famous for finding the lost missionary, David Livingstone, when Livingstone had been missing for several years in Africa. To read more about who Henry Morton Stanley was, please click on the link below entitled "Henry Morton Stanley".

Henry M. Stanley in the summer of 1878.

Henry Stanley - cricketer - died in 1900.

Henry Stanley - cricketer - was born in 1873.

Henry Stanley Plummer died in 1937.