Confessions of Jeremiah

I’m writing that focuses quite a bit on the “confessions of Jeremiah”. I suddenly came to realise that though I know the terminology “confessions” dates before the start of the twentieth century I do not know who coined it or when. Does anyone have any evidence to help me? (My excuse for asking is that I am cut off by a three hour drive from my usual print reference works and my Google skills have so far failed to help me!)