Dear Urist McLegendaryWoodCrafterPoorNappingDecisionDwarf:
Thank you for deciding to take a snooze in an obstructed corner of a dingy wood stockpile instead of your meager quarters. Perhaps you were protesting the "meager." What do you want from me? I was busy. In any event, you chose that particular moment when the suspicious Urist McVampire fish dissector/planter/fisherdwarf/macedwarf/swordsdwarf/outgoing social butterfly with a list of past associations that would make Methuselah blush, and this all at the tender age of FORTY, decided to go on break. I was watching, oh yes I was, but what oh what could I do when he happened upon you in your poorly chosen nap site? And yes, you were drained of blood right before my very eyes. So thanks for that.
And this just a month after one of my Urista McLegendaryMiners was found dead in her quarters; the victim of another vampire that I discovered just moments after the crime. Now I have two vampires penned up in rooms behind locked doors just waiting for the chance to go on break and have that drink that they haven't had in far, far too long.
p.s. Dear Urist McVampires: thank you both for choosing my fortress as your buffet immigration target. You can rest assured that I was quite shocked that I got two such illustrious additions in successive migrant waves taking my population to 48, and 57 (now 55), respectively. You can also rest assured that you will be on cavern expedition duty once I figure out how to get you down there without losing another legendary napper. Either that or atom smasher fodder.
Love, your overseer.