YANGON, Oct 2 (Reuters) - United Nations envoy Ibrahim Gambari left Myanmar's new jungle capital on Tuesday, where he was to have met military junta chief Than Shwe, a Yangon-based diplomat said. However, there was no word on whether Gambari's scheduled audience with the bespectacled 74-year-old Senior General had actually taken place. "We can assume that he has met the old man, but we don't know for sure," the diplomat said.