BLO tends to darken with time, it’s quite possible that the blank was wiped down with it years ago.

I use TransTint stains, find them very economical and quiet user friendly. I’ll mix Trans Tint stain with a little bit of alcohol, then mix with BLO (TransTint won’t mix directly with BLO, so I mix it with alcohol first). I’ll use the TransTint/BLO mixture to stain the stock. And use the same mixture when I’m rubbing out the finish…to me it seems to minimize the “burn thru” of the initial staining.