Dr Stewart received a standing ovation recently as he climbed the steps to receive his testamur from the University's Chancellor.

Dr Stewart was born on March 7, 1915, a little over a month before the first Anzacs landed at Gallipoli.

He already holds a number of degrees from other universities, and has had a distinguished career in dentistry.

Dr Stewart played down the significance of his achievement, describing himself as an "average, middle-of-the-road Australian."

"I feel a little humble about it," he said.

Dr Stewart finished what would normally have been a six-year Bachelor of Law degree in four-and-a-half years, "because of my age," he added.

"There is a saying in law that time is of the essence," he explained.

"I think if I had let it run too much longer I might not have finished it.

"I really started off thinking I might not get through the course, but when I got halfway through I thought I had to finish it."

Dr Stewart said he had decided to return to study after his son completed a counselling degree at The University of New England.

"I wanted to get back to university life," he said.

"I am a great believer in keeping the mind and body active.

"I have been told that although I am 91 years old, my biological age has not kept up with me."

Completing his law degree presented a number of challenges to Dr Stewart, not least because his course material was mostly delivered over the Internet.

"I was not literate in computers at all. I was completely self-taught as far as that was concerned."

Dr Stewart said he hoped his graduation would serve as an inspiration to other people to take up study in later life. "I think it is an encouragement to the community in general, and to people of my generation in particular," he said.