Pearly King & pearl buttons

This unusual English tradition started in London
in the 19th century and it tells about one amazing man who was born poor and became a king. His name was Henry Croft.

When the boy turned 13, he began to earn a living by sweeping the streets.

Soon he found lots of new friends.

Henry realized that he wanted to help the poor children.

Henry decided to sewed thousands of buttons to his suit and everyone thought that he was a king.

In 1907 pearly king met the king and queen
of Great Britain.

After that in different areas of London their own pearly kings and queens appeared.

For 140 years the Pearl is a symbol of the monarchy of charity in England. Their slogan is
«One never knows»

My questions
1. When this unusual tradition started?
2. What was his name who became a pearly king?
3. Did he want to help his friends?
4. What did Henry decide to do?
5.When did Henry meet the king and queen
of Great Britain?
6. What is the main idea of the Pearl monarchy?