It makes my blood tingle just to touch it.

You chaps must feel the same toward the British flag, for that's your flag.
"Now let me show you how the flag is made up," and Doctor Joe proceeded to trace St.George's Cross and St.Andrew's Cross, explaining them again as he did so.

"In the year 1801 another banner was added.

This was the Banner of St.Patrick of Ireland.

St.
Patrick's Cross was a red diagonal cross on a white field, and here you see it." Doctor Joe traced it on the flag.
"There," he went on, "you have the British flag complete.