"The boards have been returned, along with a $100 donation for the panic and worry and problems that it has caused Acadia Hall and the community of Sackville," says Linda Hefler, a volunteer at Acadia Park.
Although the lumber is only worth about $600, the boards hold special significance for local volunteers, as they are numbered and designed to fit together.
Hefler said a plea on social media must have reached the thief, who remains anonymous. A letter was found in the mailbox at Acadia Hall, along with the money.
"Basically, the person apologized," Hefler said. "They were very remorseful in taking the boards. They thought they were abandoned, and they had noticed them there for quite some time."
Security footage outside Acadia Hall shows a van driving away with the boards on the night of Sept. 29.
The $100 donation will go toward supplies for the outdoor rink, which is expected to open in December.