I have come across this story a few times before in clippings. The story is of the origin of the willow trees that line the banks of the Molonglo River in Canberra and their association with Napoleon Bonaparte and his grave at St. Helena.
The story continues with a local man by the name of Elijah Bainbridge completing the planting on both sides of the river from slips. It is possible I imagine that today's remaining trees (they are currently being removed as a noxious weed from ACT waters) are possible descendants from that early time in Canberra.
The Canberra Times - 17 February 1940
National Library of Australia