From Ernst Ingersoll (1917) The Life of Mammals

Another photo of purported pygmy elephant “Congo,” evidently an earlier shot than the one below given the smaller tusks. Although deemed a distinctive dwarf subspecies, Elephas africanus pumilio, by Noack in 1906, Congo continued to grow until her death in 1915 when she was 204 cm (about 6’8”) tall. Given her estimated age of 16, this is well within the normal size range for the African Forest Elephant, Loxodonta cyclotis a species poorly known to Western science in Congo’s day. 

See: Groves and Grubb 2000 (pdf)