I read this story at some other forum since there are many OZ fans here i think they might be able to confirm it, and it says those bowlers were on the fringes of national selection and so I may ask who were those two gentlemen.
Also a story about Bradman that I read about: In the 1960s, he attended some event at one of the aussie state side's grounds. A couple of young quickies (on the fringe of the national side) asked if they could throw down a few deliveries at him.
"I haven't picked up a bat in nearly 20 years" replied the Don.
They convinced him that they'll just throw a few up there - it would be an honour for them.
So he stood there and hit the ball around for a bit and told them they could bowl a bit quicker if they wanted.
Within 20 minutes, both were at full pelt and he repeatedly hit them to the boundary. Forget the fact that this was 20 years after his retirement, the most amazing thing about this story was that he was neither wearing pads or gloves!!!