Since 1918, Marlborough sounds residents have had their mail, groceries and provisions delivered by water, carried by the Pelorous Mail Boat.
Still operating today, it's one of the world's last such mail services.
It's history in the community and the family that ran the boat for years has been documented in a book Time and Tide...which also serves as somewhat of a love letter about the beautiful place it's set.
The book's author Lorain Day tell us about writing the non-fiction story.
