I kept waiting for it to be opened. This is an old reference to a trick some writer (bad ones) play upon readers where something that is right there within sight of the characters isn't shown to the readers. Or in this case, someone... namely Snow's father. Then there are all the cliche lines, the sudden changes in whole character demeanor. The waffling and wagging until you feel like a whole season of transformation got flushed on some characters to do a big reset... so the writers don't have to follow through on supraplot points that really don't know how to conclude. Or maybe they are afraid to because they don't know what to do next.
And still that black bag was never opened... and father and husband never even appeared at his wife's funeral.
Someone needs to black bag the writers... and get some new ones.