What to say?

I received this email today.

December 1, 2004

Dear Anthony,

Yesterday the Department of History at UC Berkeley received an express package.
The inside  large brown envelope is addressed  to University of Michigan.  Inside it are letters from Bourne and DelBourgo in envelopes addressed to UMI and one from Lewis in a plain envelope with no address.  Also enclosed are two copies of the McGill transcript and a writing sample.

We have not opened the letters and transcripts.  What do you want us to do with this mailing?
We can send it first class to U Michigan or you can call around and see if U Michigan got the package intended for us and we can each  keep our respective items.  What you've sent us inadvertently is also required for your Berkeley application.

Please advise.