206 THE SWISS FAMILY ROBINSON
through which Jack and I had once before passed.
' Here,' said Fritz, ' we can defend ourselves against all enemies, and, if you take my advice, father, you will establish a post here.'
Jack, who never attended to the conversation of those around him, caught at the last words his brother had spoken, and bellowed out:
' A post-office ! Why, where can we send the letters to ?'
' Australia and New Zealand,' replied I, as gravely as possible, whereat there was a general laugh.
The rest of the morning was devoted to the fortification of our camp. We then dined ; but the heat was so powerful that we were obliged to postpone any extra labour until the next day.
Nothing troubled the repose of the night. We were up at daylight, and in a few moments our preparations for a further exploration were complete. I took with me my three eldest sons, leaving Francis with his mother.
We passed through the defile, and ventured into a country where we had been but once before. Jack recognized the place where we had taken the buffalo. The river, which divided the plain, was bordered by