Thank you very much! I couldn't resist making Snape a Sherlockian, haha, so I'm glad that you enjoyed it.
I -adore- Catullus. Yes, I think you're definitely right about Lesbia, but they're such wonderful love poems, I couldn't resist. I absolutely can't take the credit though - the fic I reference at the top, 'Amo, Amas, Amat' did it first, and absolutely beautifully - definitely a must-read!