appreciate none of these four is related, in the sense they belong together - just that they take up less shelf space when combined like this. Can recognize the Davidson green cloud glass, the black plinth is possibly Sowerby or Bagley and one or both of the others might also have something to do with Bagley ?? But, since I'm very unsure, have posted in 'Glass'. If anyone would care to advise the makers, would be appreciated. Can remember when these black plinths could be found at boot sales commonly, now appears even they fetch decent money.