You go to your own post, and "hover" your cursor over
@Runewolf1973 . This will reveal a box that has a little information about him. In the lower right corner of that box, you'll see a small, orange box that says "Start Conversation." Click that, and it will take you directly to the Private Message application. Fill it out just like you are posting something on the forum, except only you and Runewolf will be in on the conversation.
When he responds, you will see a little red dot on that "envelope" up in the upper right corner of your computer screen. Click that, and it will take you to his message.
Good luck! I am a computer ignoramus, and had to figure all of this out by trial and error. If I can do it, you should have no trouble.
Runewolf is a good man. If you order a knife, I think you will be very happy with it.
Notchy Bob