Two batteries had been manufactured, one for Granite House, the other for the corral; for if it was necessary the corral should be able to communicate with Granite House it might also be useful that Granite House should be able to communicate with the corral.
Deux piles avaient été fabriquées, l'une pour Granite-House, l'autre pour le corral, car si le corral devait communiquer avec Granite-House, il pouvait être utile aussi que Granite-House communiquât avec le corral.