I make a trip to Downieville several times a year and would be happy to check on this information. I believe I will go up again about mid-October.
The County Clerk-Recorder has birth records (1857-present), marriage records (1852-present), and death records (1864-present), although some of the earlier vital records are incomplete. An index is available. I will check this as well.
If you have any additional information, please send it to me.