Fading the edges of an image - recreating necessary steps in Photoshop Elements

Being a novice with Photoshope Elements, nevertheless I achieved the look I wanted with several photos,

However, not having written down the detailed steps for the process, I now find, a year later, that I have no idea of how I achieved the desired results.  

I am looking for some detailed help and assistance in order to recrated the look and effect of the attached image.

Thanks to any and all for your assisance

Ron  - Atlanta GA