Message centre

[bones]

I know I'm just your average dumb pr&ck, but I have just found a private message from a person, so I opened it, read it and. Then decided to reply but to my dumb mind I can not for the life of me, find a way to reply to the original message.
surely there must be a way?

[RossM]

Go to Message Centre
Then Inbox
click on the subject title of the message in your inbox
type away where it has 'Write Something"