Complex sentence: He was Private Secretary to Queen Victoria from 1895 to 1901 and to King George V when he was Prince of Wales from 1901 and later sovereign from 1910 to 1931.
Split into simpler sentences: He was Private Secretary to Queen Victoria during the last few years of her reign, and to George V during most of his reign. Bigge served in the George V when he was Prince of Wales from 1901 and later sovereign from 1910 to 1931.