"Neville knew that Luna had been captured. In order to get Luna out, I needed a place for her to escape to. I had been ordered not to send messages out to anyone, so I wrote a letter to no one about my plan to help Luna and when I was outside, I tied it to a crow and told the crow specifically not to send the letter, especially not to someone that could help me. I managed to convince myself fully that this wasn’t something Hermione would want to know."