The speaker of Gray's "Elegy Written in a Country Churchyard" sure is excited to be left alone in a dark churchyard after the sun goes down. What's up with that? This guy might just like his solitude, but we're guessing that there's more to it than that.
The speaker emphasizes the solitude of each individual villager in his "cell"-like grave (15). Since death isolates us all, it seems appropriate that the speaker should be completely alone during his musings about death and mortality. Talk about a downer!
Because the speaker is contemplating the lives and deaths of complete strangers, it makes sense that he should imagine how his own death would be remembered by strangers, as opposed to by his own friends and family. Grim, but appropriate!