, it's incomplete. Please show us the complete sentence.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Yes, it's semantically incomplete, hence the semicolon... I was more interested in the grammatical aspect of the sentence and its naturalness.
anonymous However, there was a difference he could tell:.......
It sounds to me like you're trying to say
However, he noticed a difference: ...
It strikes me as strange to use a construction like 'tell a difference'. It seems to be a sort of corruption of 'tell the difference between'.
CJ