I was motivated enough by this to seek out some of the mustards he mentioned -- and it looks like the Beaver Olde English is no longer on their web page? Has it been discontinued?
Not sure, but I've found almost all Beaver condiments (not just their mustards I've tried) to be worth the trouble to find, especially their Tartar Sauce.
One upside, I suppose, of living in Portland is that Beaver is just 'the standard condiment brand I get at the grocery store.' I do like their stuff, and their tartar sauce was what made me try their other products.