An eyebrow raiser to be sure. I can understand the clergyman being so Baptist that he'd still use the name Jehovah since it was popular in English and German churches for a long time during and after the Reformation, but 607?
See ¶ 6 under the heading "The historicity of the Book of Daniel". It's about half way down the page:
Maybe he's been reading CT Russell or some source Russell used? He has no interest in the Gentile Times, day-year stuff, or 1914.