Just checked on Wikipedia. Harris was indeed in Inverness-shire prior to 1975. Inverness-shire includes the following islands: "North Uist, South Uist, and Harris in the Outer Hebrides, and
Skye, and the Small Isles in the Inner Hebrides." "In 1972, the Isle of Rockall Act was passed, formally incorporating the tiny island of Rockall into Scotland as part of the Isle of Harris, ...