Complete the following sentence: Upon his return to the service in March 1907 Mulock joined the torpedo course at HMS "Vernon". Shortly before Scott had invited Mulock to join him on a second polar expedition; the young lieutenant accepted without hesitation.<unk> Shortly before Scott had invited Mulock to join him on a second polar expedition; the young lieutenant accepted without hesitation. Ernest Shackleton then wrote to him inviting him to participate in the
Nimrod Expedition<unk> Due to the gentleman's agreement with Scott, Mulock declined but unintentionally sparked off a rivalry by revealing to Shackleton that Scott was planning to "go south again"; it came as no surprise that in April 1908 Mulock failed to qualify as a torpedo lieutenant. Commodore J. Briggs, RN, commanding "Vernon", recorded on Mulock's official service record that "his failure to qualify in torpedo was due to his inattention", a clear rebuke for the efforts of Scott and Shackleton. 1908 Mulock was appointed to Captain Henry Oliver, RN in preparation for a command of his own.