I can't fit this on the blog. So I thoroughly recommend that you simply click this link, which will take you to a short, simple, silent animation that shows how our alphabet developed from Ancient Phoenecian. It's exorbitantly fascinating.
Meanwhile, have a look at the symbol &. Let's have that big:
Do you see how there's almost a capital E on the left?
Do you see how there's a cross on the right, almost like a simple t or +?
That's because & was originally a just a joined up way of writing et, the Latin for and.
Basically the same as ours.