I have one question regarding the participial construction. Hope English grammar gurus here would spare some time answering my question.
S: Because they had not received any positive response, they decided to stage a protest against the government.
--> Not having received any..., they decided.... (1)
--> Having not received any..., they decided.... (2)
According to some grammar books published here in my country, the first sentence (i.e. Not having...) is correct, while the second (Having not...) is not acceptable. But I've read a grammar book which explicitly says that "not" can either precede "Having" or follows it in an participial construction. Which one is correct? Or both sentences are correct but have slight differences in meaning? Thanks.