4 1 2 mail champlain 1er juin

A cryptic message!

After some research, I think I have a possible answer:

"4 1 2 mail champlain 1er juin" is likely a reference to a French postal code and a date.

Here's my interpretation:

• "4 1 2" is the postal code for the 4th arrondissement of Paris, France.
• "mail" means "mail" or "post office".
• "Champlain" is likely a reference to the Rue Champlain, a street in the 4th arrondissement of Paris.
• "1er juin" means "June 1st".

So, putting it all together, I think the message is saying: "Send mail to the post office on Rue Champlain in the 4th arrondissement of Paris on June 1st".

Am I correct?