The castle that was the Seat of the Culdares line was owned by what person from the 1920s until the 1950s? 
Menzies of Culdares:  Meggernie Castle in Glen Lyon, Perthshire was the Seat of the Culdares line Meggernie Castle:  From the 1920s until the 1950s, the castle was owned by Sir Ernest Wills, 3rd Baronet.
Sir Ernest Wills