((MUCH better))
"Because it's a blue envelope. Bluest envelope I've ever seen. I'd chace it and say it's TARDIS blu--wait, what the heck's a TARD--Excuse me for a moment." Meli turns around, pushing her hand against her forehead. Where have I seen that color before? Nowhere in the city, so maybe outside? No, it's bluer than the sea. The sky? No, hmr... Oh. The police box. She stands straight again. "But why would he get an envelope if we just found it here?" she wonders aloud.