Mac or Windows computer?
Do you know the address, or any transactions he made that we can get the address from?
He had a few different wallets. He keep a Chromebook that was never online in a Safety Deposit Box. He gave me this paper wallet with those string of numbers. I know he didn't like going online.
Do you have the Chromebook or not?
Wont be able to access the Chromebook for a couple of weeks. He kept it in a Safety Deposit Box and the bank won't holds it for 30 days with a proof of death. Hopefully it will show something.
It is definitly something on the Chromebook. Unless you get it, I wouldn't make my self crazy about, what the Random letters and numbers could mean.
So, be Patient, when you get the Chromebook, you will find out by your self, what the note means.