This can be stated in active form. Alternate translation: "four men guarded the pillar to the west" (See: [[rc://en/ta/man/translate/figs-activepassive]])
The numbers "four" and "two" refer to guards. Alternate translation: "Four men guarded the road, and two men guarded the court" (See: [[rc://en/ta/man/translate/figs-ellipsis]])