And yet it was not quite the last. I found myself weary and yet wakeful, tossing restlessly from side to side, seeking for the sleep which would not come. 

Far away a chiming clock struck out the quarters of the hours, but otherwise a deathly silence lay upon the old house. And then suddenly, in the very dead of the night, 

there came a sound to my ears, clear, resonant, and unmistakable.

上句，出现了Far away a chiming clock struck out the quarters of the hours, but otherwise a deathly silence lay upon the old house

书上将but otheriwse翻译成了“与此相反”： 远处的钟声每到一刻钟时就会敲响，而这古老的宅邸却与此相反，笼罩着一片寂静。

参照 http://ask.yygrammar.com/q-43108.html 学习。

我个人认为，书上将提问的句子中的but otherwise翻译成：

“而这古老的宅邸却与此相反“ 是不妥的。 应该翻译成：

每到一刻钟，就会从远处传来敲钟的声音，除此以外，这古老的宅邸笼罩着一片寂静。

请老师批评指正！