In the period immediately after his return, Shackleton engaged in a strenuous schedule of public appearances, lectures and social engagements. He then sought to cash in on his celebrity by making a fortune in the business world. Among the ventures which he hoped to promote were a tobacco company, a scheme for selling to collectors postage stamps overprinted "King Edward VII Land"—based on Shackleton's appointment as Antarctic postmaster by the New Zealand authorities—and the development of a Hungarian mining concession he had acquired near the city of Nagybanya, now part of Romania.