Blaiklock Island is a high and rugged, irregular-shaped island 9 miles (14.5 km) long, lying between Bigourdan Fjord

Bigourdan Fjord

Bigourdan Fjord is a sound, long in an east-west direction and averaging wide, lying between Pourquoi Pas Island and the southwest part of Arrowsmith Peninsula, along the west coast of Graham Land. It was discovered by the French Antarctic Expedition, 1908–10, under Jean-Baptiste Charcot, and...

 and Bourgeois Fjord

Bourgeois Fjord

Bourgeois Fjord is an inlet, long in a northeast–southwest direction and wide, lying between the east sides of Pourquoi Pas Island and Blaiklock Island and the west coast of Graham Land. It separates Loubet Coast to the north from Fallières Coast to the south...

. It is separated from Pourquoi Pas Island

Pourquoi Pas Island

Pourquoi Pas Island is a mountainous island, long and from wide, lying between Bigourdan Fjord and Bourgeois Fjord off the west coast of Graham Land. It was discovered by the French Antarctic Expedition under Charcot, 1908-10...

 by The Narrows

The Narrows (Antarctica)

The Narrows is a narrow channel between Pourquoi Pas Island and Blaiklock Island, connecting Bigourdan Fjord and Bourgeois Fjord off the west coast of Graham Land. It was discovered and given this descriptive name by the British Graham Land Expedition , 1934–37, under Rymill....

 and from 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...

 by Jones Channel

Jones Channel

Jones Channel is an ice-filled channel, 8 nautical miles long and 1 to 2 nautical miles wide, lying between Blaiklock Island and the south part of Arrowsmith Peninsula and connecting Bourgeois Fjord with the head of Bigourdan Fjord, off the west coast of Graham Land. Named for Harold D...

. The feature was partially surveyed in 1936 by the British Graham Land Expedition

British Graham Land Expedition

A British expedition to Graham Land led by John Lachlan Cope took place between 1920 and 1922. The British Graham Land Expedition was a geophysical and exploration expedition to Graham Land in Antarctica between 1934 to 1937. Under the leadership of John Riddoch Rymill, the expedition spent two...

 under Rymill

John Riddoch Rymill

John Riddoch Rymill was an Australian polar explorer, who had the rare second clasp added to his Polar Medal.- Early life :Rymill was born the son of a farmer on 13 March 1905 at Penola, South Australia...

, at which time it was charted as a promontory. It was determined to be an island in 1949 by Kenneth V. Blaiklock, a Falkland Islands Dependencies Survey surveyor for whom it is named.