这里的for是是什么用法

题目

这里的for是是什么用法
For there drifted out to Soapy's ears sweet music that caught and held him transfixed against the convolutions of the iron fence .
for在这里是什么用法?
好吧..那就肯定是表原因的连词了啊 但是我最近看了篇关于for用法的文章 里头说 for表原因不能在句首 通常是在句后用逗号标志
另外 sweet music 为什么放在后面了 为什么不 drifted sweet music that ...out to Soapy's ears

答案

But on an unusually quiet corner Soapy came to a standstill. 【Here was an old church, quaint and rambling and gabled. Through one violet-stained window a soft light glowed, where, no doubt, the organist loitered over the keys, making sure of his mastery of the coming Sabbath anthem. 】For there drifted out to Soapy’s ears sweet music that caught and held him transfixed against the convolutions of the iron fence.
这里只有for一个句子 承接本段开头那句,做那句的原因,中间那一大段都说的是 美妙的音乐
可是,在一个异常幽静的地段,苏比停住了脚步.【】
(由于)动人的乐音飘进苏比的耳朵,吸引了他,把他胶着在螺旋形的铁栏杆上.
（做开头那句的原因）
there drifted out to Soapy's ears sweet music
there 地点状语提前 句子倒装
这里是为了sweet music 后面的限制定语从句从句 特意用的这个倒装