what was discovered in the latter?
Barrier Inlet
Ernest Shackleton
Shackleton reluctantly agreed to look for winter quarters at either the Barrier Inlet—which "Discovery" had briefly visited in 1902 – or King Edward VII Land.

what is farthest south? It is the most  southerly latitude reached by explorers before the conquest of the South Pole in 1911. who led the explorers? Robert Falcon Scott and Ernest Shackleton what is the nationality of the latter? He is Irish can you name any of his expeditions? The "Discovery" expedition, the "Nimrod" expedition
wiki:5384474
Ernest Shackleton [SEP] "Nimrod" expedition, 1907–1909
An extended search for an anchorage at King Edward VII Land proved equally fruitless, so Shackleton was forced to break his undertaking to Scott and set sail for McMurdo Sound, a decision which, according to second officer Arthur Harbord, was "dictated by common sense" in view of the difficulties of ice pressure, coal shortage and the lack of any nearer known base. "Nimrod" arrived at McMurdo Sound on 29 January, but was stopped by ice north of "Discovery"s old base at Hut Point. After considerable weather delays, Shackleton's base was eventually established at Cape Royds, about north of Hut Point.