This hippo's name was "Newsboy", so named because the Adelaide evening paper "The News" organised a fund to buy him from Auckland Zoo, where he had been born. He arrived in Adelaide in 1934 and was a popular exhibit until his death in 1977.
He was definitely held behind a strong fence. The wire netting in the photo was a screen between him and the public. It was there because Adelaide's previous hippo died when some fool threw a large rubber ball into his open mouth and blocked his intestine.
I did hear a story, not sure if it the same hippo, that a golf ball was thrown by a child into the mouth of a hippo, which it choked on I think. Not sure of all the details of that, but that is how I think Newsboy died. I think soon after, money was raised by the newspaper to obtain some new hippos if I am not mistaken.
Yep. The pair of hippos currently at Adelaide Zoo were bought around that time as adults from Ashton's Lion Safari, (which was closing down) at Bacchus Marsh, Victoria.