Supermarine Southampton: Watertight compartments

In researching the marvellous and influential Southampton, I’m trying to uncover specific details about some of its features.
Of the Mk 1s, they had a wooden construction double hull (i.e. inner and outer), the space between the double bottom having 10 watertight compartments. It is this specific detail that I would like more information on. Does anyone have schematics/ diagrams that focus on this specifically? I would love to know more about this feature of the flying boat.