This collection comprises letters, photographs and signed agreements sent to Peter Solness regarding his "Tree Stories" project. The bulk of the letters are from tree enthusiasts from all around Australia writing about their favourite trees. The letters were the result of multiple talk-back radio sessions Solness did at the time on the ABC evening show, which had a national broadcast. It was a way of sourcing material in the production of the book. Solness asked listeners to send details for possible inclusion in the book. The signed agreements are from those listeners and other contributors whose writings were included in the book.