You can create a filter which applies a label to that person's email. Labels are GMail's equivalent to folders, but they are more powerful because you can cross reference them.
Additionally, you can type in that person's name or email address in the search box and pull them all up.
Hey thanks for the tip. On the Apple Mail you can click just one button on from with one email and all the emails from that person are then shown together.
But at least there is a way to do it.
I’ll have to try the labels method. Thanks again.