請問looking through the bushes back of the wall中的back是什麼詞?back前是不是漏了in?in back of?

... the xxx back of the yyy ... 
= the xxx on the back of the yyy 它的意思是"在YYY背後的XXX".在口語裡面,尤其是兒童,時常會把"on the"省略掉.

back應該是名詞. "on the back of the stone wall"是(地點)副詞.是在形容bushes.

所以,妳問題整句的意思是: "鹿爸爸看透過在圍著麥田的石頭牆後面的樹叢說著..."

其他的例子有:

... the bushes front of the stone building ...
... the trees side of the water hole ...

你就一起學起來吧!

back=adverb particle;
contrasted with forward to, away from the front.
eg:-Look back, please !
eg:-The wall held the bushes back
eg:-Look back in the bushes and be walled with yourself.
eg:-The wall stands back at your distance from the bushes.