《徐霞客游记·滇游日记三十六》
应当横着筑起一道堤，横亘在龙虎两砂之间，而中间蓄一池水，才成完整的格局。
当横筑一堤，亘两砂间，而中蓄池水，方成全局。
I think we should build a dyke lying between the tiger and dragon sands, and store up a pool of water in the middle, to complete the layout.