I will make this short and to the point. Greencastle(VGN.V, GRSFF) has some gold properties and an energy royalty throwing off a couple hundred-thousand in cash. They also have 11 million shares in Deveron (FARM.V, DVRNF) worth $6.6 million as I'm typing, plus $3.8 million in Golden Lake (GLM.V, GOLXF). That comes to $10.4 million. VGN has a $9.4 million market cap at the moment. It's up big today and all these stocks have been volatile, so the discount moves arounod a lot.
I will note, somewhat ominously, that VGN also popped in 2008 and 2011.