Lewis Peaks are two prominent peaks, 1,065 m, standing 3 nautical miles (6 km) east of Day Island

Day Island

Day Island is an island, 7 nautical miles long and 3 nautical miles wide, lying immediately south of The Gullet and 2 nautical miles north of Wyatt Island in the north part of Laubeuf Fjord, off the west coast of Graham Land...

 and surmounting the west part of Arrowsmith Peninsula

Arrowsmith Peninsula

Arrowsmith Peninsula is a cape about long on the west coast of Graham Land, west of Forel Glacier, Sharp Glacier and Lallemand Fjord, and northwest of Bourgeois Fjord, with Hanusse Bay lying to the northwest. It was surveyed by the Falkland Islands Dependencies Survey in 1955-58 and named for...

 on the west coast of Graham Land

Graham Land

Graham Land is that portion of the Antarctic Peninsula which lies north of a line joining Cape Jeremy and Cape Agassiz. This description of Graham Land is consistent with the 1964 agreement between the British Antarctic Place-names Committee and the US Advisory Committee on Antarctic Names, in...

. First roughly surveyed in 1909 by the French Antarctic Expedition

French Antarctic Expedition

French Antarctic Expedition refers to several French expeditions in Antarctica.-First expedition:Yves-Joseph de Kerguelen-Trémarec was a French explorer....

 under Charcot. Resurveyed in 1948 by the Falkland Islands Dependencies Survey (FIDS) who named it for Flight Lieutenant John Lewis, pilot of the Auster airplane which was used from the John Biscoe

John Biscoe

John Biscoe was an English mariner and explorer who commanded the first expedition known to have sighted the areas named Enderby Land and Graham Land along the coast of Antarctica...

 for reconnaissance of ice conditions in Marguerite Bay

Marguerite Bay

Marguerite Bay or Margaret Bay is an extensive bay on the west side of the Antarctic Peninsula, which is bounded on the north by Adelaide Island and on the south by Wordie Ice Shelf, George VI Sound and Alexander Island. The mainland coast on the Antarctic Peninsula is Fallières Coast. Islands...

in February 1950.