Treatise on Military Preparedness (Vol. 98)

...Shangdianpu, 30 li away. Besides the quota-registered civilian laborers who guard the city walls and watch over storehouses, the county has other civilian laborers who rotate shifts, entrusted to the volunteer militia for supervision. From Zhetangpu, 40 li away; to the Shangyu Port Inspection Office in Liyang County, 60 li away; to Kongzhen, 60 li away; to Shangdianpu, 30 li away—these patrol areas appear to be strictly guarded. It is appropriate to continue ordering the Patrol Assistant to conduct frequent inspections so as not to allow for negligence.

Gaochun County Patrol Assistant: under his command is one patrol inspector at the Guangtong Town Inspection Office, with 30 archers. No patrol boats were originally built. The defense zone: from the county by land to Kongzhenpu is 60 li; from the county by land to Guangtong Town is 60 li; from...