In 1892 when Robert Peary reached the cape he claimed that it was the northernmost point of land , later it was discovered that Kaffeklubben Island was slightly north of Cape Morris Jesup . Robert Peary reached the cape in 1900 , believing it to be the northernmost point of land in the world , although it was later found to lie slightly to the south of the northernmost tip of Kaffeklubben Island .