Michael Cooper (pp. 93-95).
"He constructed a moat around the outside, spanned it with drawbridges, and placed different kinds of birds and fowl in the water. The walls were six or seven ells high, and in some places six ells wide and in other places seven or eight ells wide, according to the requirements of the building or place. He built three very large gates with stone fortifications. And there within he had dug another very broad moat and laid out one of the loveliest walks that I have seen in Japan. Nothing more can be said about the excellence, the good order and the neatness of the interior."
Nobunaga no tame!