"Now, I intend to shut myself in until the Dark Lord has need of me again. I have some hope that I'll be able to return to my own home before very long." Snape knew his chance for solitude would only last so long, and meant to take full advantage of it. "If you need anything, of course, you need only write." He said it mostly out of politeness; he did not intend to correspond with anyone unless it was absolutely necessary. "- And if you do hear anything from your son, you'll let me know."