The file consists of correspondence between the Engineer to the Humber Conservancy Board (Arthur Ernest Butterfield, then from 1946 Ralph John Hindmarsh), various companies tendering for repair work required for the motor launch 'Rosemary', and companies interested in purchasing the vessel from the Board. The file also includes lists issued by the Director of Small Craft Disposals, the Admiralty, Cobham, Surrey, showing vessels available for purchase; the Humber Conservancy was looking for a replacement motor launch.

Returns of Form 'A' New Articles Required' for the 'Rosemary' have also been included.