The phrase "haddest a bearing on" is written in Early Modern English, which is a version of English used from the 15th to the 17th century. The word "haddest" is the second person singular past tense of the verb "have" and is pronounced /ˈhædəst/. The phrase means "did you have an influence on." It is important to understand the spellings and pronunciation of words from different time periods to fully comprehend historical texts.