On which Scottish islands does Victor attempt to create the female creature?

Victor attempts to create the female creature on the Orkney Islands, a remote Scottish archipelago.

After the creature demands a companion, Victor reluctantly agrees, hoping that the two beings will leave humanity behind. He travels with Henry Clerval to Britain and then settles in an isolated hut on one of the Orkney Islands, where he secretly works on the second creation. The remote setting gives him privacy but also intensifies the story’s atmosphere of loneliness and moral unease.

Victor eventually becomes terrified by the possibility that the female creature could reproduce and establish a race of beings dangerous to humanity. While the unfinished companion is still on the operating table, he tears her apart. The original creature witnesses the destruction and responds with the threat, “I will be with you on your wedding night.”

The novel does not identify a particular Orkney island, so answers such as Hoy or Mainland are more specific than Shelley’s text allows. The canonical answer is the Orkney Islands, not the Hebrides, Shetland, or the Isle of Skye.