 Complete the following phrase:  Based on his experiences with McClintock and his love for naval traditions, Markham, future President of the Royal Geographical Society, became a fervent believer in the principle that manhauling was the purest form of polar travel. Markham became the driving force behind British Antarctic exploration endeavours in the early 20th century, and was the mentor of Robert Falcon Scott, to whom his thinking and drive were transferred. After his unhappy experiences with dogs in the Antarctic on the 