Before the retreat, I had always thought that John Calvin never touched much on the book of Job since it was one of the books left out of his commentaries. When Dr. Stephen Chan mentioned that there is a sermon on Job by this great master, it sank well in my memory until I looked it up and found some rare works by John Calvin, including Sermons on book of Job on worldcat.org.
But so far NYPL has "Sermons on 2 Samuel : Chapters 1-13".
Although I had collected relatively complete works of John Calvin that's available in the online resources, I failed to further discover more of the rare ones.