全無人跡 Not A Footprint Anywhere
你看他停住雲光，徑到了妖精宅外。見那門樓門關了，不分好歹，掄鐵棒一下打開，闖將進去。那裡還靜悄悄，全無人跡。東廊下不見唐僧。你看他停住云光，径到了妖精宅外。见那门楼门关了，不分好歹，抡铁棒一下打开，闯将进去。那里还静悄悄，全无人迹。东廊下不见唐僧。
逐句解 Line by line
Look at him: he brought his cloud to a halt and went straight to the outside of the fiend's house.
你看他 is the storyteller turning to the audience — look at him — and it is a leftover from performance, when this was told aloud to a room.
Seeing the gate of the gatehouse shut, he did not stop to sort good from bad but swung the iron rod and broke it open at a blow, and charged in.
不分好歹 is without distinguishing good from bad, that is, without pausing to consider — still a live idiom for acting first and asking later. 將 here is the jiāng that attaches to a verb of motion to push it along: charged, and charged in.
Inside it was silent as ever, without a footprint anywhere.
跡 is jì, a trace or footprint. Modern dictionaries record both jī and jì for it; the reading here and throughout is jì. 靜悄悄 is hushed, and the doubled final syllable is doing what English does with deathly.
Under the eastern gallery there was no Tang Monk.
Seven characters, and the shortest sentence in the passage. The gallery is named because that is where the master was tied up on the previous visit — Pilgrim goes to the place he remembers, and it is empty.
The third descent starts by rewarding him for knowing his way about and then punishes him for it. He smashes the right gate, crosses to the right gallery, and finds nothing, because the fiend has moved.
The silence is the threat here. Every previous entrance into this cave has been met by small demons; an empty house is worse news than a guarded one.