Metchosin, The Wreck of the Number Nine is in the DT, hiding under the title of On a Cold Winter's Night. The best way to find if something is in the DT is to try to use some unique phrase, enclosed in brackets like this: [his brave heart stood still].
I (and many others) have carefully typed out the words to a favorite song, or one that someone has requested, only to find that it was already in the DT. I try to check before I start nowadays, but I still slip up now and again.