Hi, logged on today and found message from one of my friends, replied to by another. It disappeared and I can't find it anywhere .... One suggested it was on my profile wall, not sure what or where that is .... Get news updates fine and can comment on diaries ..... Confused old duffer !!!

my home > profile
takes you to your personal profile view so you see "just" what is posted by you and the comments others have made to what you have posted.

it's possible you hid the friends posts?
my home > friends
find the friend in question and click unmute / unhide

Go to the "My Home" tab and click "Profile".

Thanks, went to friends but there was no mute or hide option .... Any thoughts ?

if there wasn't an option to unmute / unhide them then they aren't muted or hidden.

I'd look on your profile if it's a message To you written on your wall it'd be visible on my home > profile
that gives you YOUR wall while my home
presents you with the status updates of all your friends as well as your own status / posts / responses. It's easier to find "your stuff" on "my profile"