WORDs – Yuan Mei’s Ancient Wall
JP Seaton

line a

? ? ? ? ?
word-for-word old, ancient wall two-character word for garden or courtyard
           So: Ancient wall, courtyard corner (in a corner of the courtyard)

The two halves of the line are, grammar wise, just two pictures  with a pause between them.

The line a is entirely “imagistic”, consisting of   adj.+N = old wall / caesura, (caesura=pause. It’s marked in our W-F-W’s with the slash / ), so,  old wall + / + two syllable noun in position where a N. acts as an adjective =(courtyard) + N, corner.