For over 500 years, paper was only available and sold as single sheets. In 1902, an inventive Australian used half size sheets of paper, a bit of glue and cardboard to create the what?

Birchall's of Launceston in Tasmania started selling the world�s first notepads, calling them 'Silvercity Writing Tablets' after J A Birchall thought it would be a good idea to back sheets of paper with cardboard and glue them together at the top. His British paper suppliers weren�t so keen, but, they were persuaded by Birchall that it was a good idea!