 During 1912, an additional 2,400 Edward VII ½d stamps were overprinted, and 1,940 of these were carried aboard the Terra Nova when it returned to Antarctica in the 1912-13 summer season.The first stamps inscribed Ross Dependency were issued on January 11, 1957, in conjunction with the New Zealand Antarctic Expedition, led by Sir Edmund Hillary (part of the Commonwealth Trans-Antarctic Expedition).Before the expedition left New Zealand, on 23 November 1956, Hillary had been appointed postmaster.