Did John Wycliffe accept extreme unction?

According to Bruce Shelley, in [*Church History in Plain Language*](https://books.google.com/books?id=RbfVAQAAQBAJ&pg=PA237) , John Wycliffe, the early dissident in Catholicism, accepted the sacrament of extreme unction: > He retained belief in purgatory and extreme unction However, this seems to contradict what Shelley writes next: > he admitted that he looked in vain in the Bible for the institution of extreme unction [...] The standard Wyclif used to judge the Roman Church was the teachings of Scripture. I have a feeling that Wycliffe's views on extreme unction were a bit more nuanced, or at least confusing, than that he simply accepted it. So: - What did Wycliffe believe about extreme unction? - If he accepted it, on what basis did he do so? Biblical (*contra* Shelley)? Or non-biblical? - If he rejected it, how did he explain [James 5:14–15](https://www.biblegateway.com/passage/?search=james+5%3A14-15&version=ESV) ? - Do his writings indicate that his views changed during his life?