From the upper end of the garden you may soon see her come through the Postern gate, if you care to watch." "I certainly should like to see her," I answered, rapidly losing faith in my conclusion that Yolanda was the princess.
The Castlemans did not offer to move, but Yolanda, springing to her feet, said, "Come," and led the way.
The upper end of the garden, as I have told you, was on the banks of the Cologne at a point where it flowed into the castle moat.

The castle wall, sixty feet high at that point, bordered the west side of the garden.

The moat curved along the right side, and the river flowed past the upper end.

Castleman's house faced south, and stood on the lower end of the strip of ground that lay between the castle wall and the moat.
The Postern was perhaps three hundred yards north from the upper end of Castleman's garden.

Since it was on the opposite side of the river, one could reach the Postern, from Castleman's house, only by going up to the town bridge and back to the castle by the street that followed the north side of the Cologne.
We all walked to the upper end of the garden, and stood leaning against the low stone wall at the river's edge.