Many art works are not on display in galleries and museums because there is just not enough display space and the collections are large. However, it is still frustrating to see how many are out of sight.
One work I came across is an example: The Green Bottle by the Scottish Colourist Francis Campbell Boileau Cadell. I saw this for the first time recently and liked it a lot, but had never seen it before. Looking it up, I discovered where it was and was disappointed to see that it was "In Storage". A shame because it's a great painting. At least it is in the National Gallery of Scotland, so I might get a chance to see it in person sometime.
This one joins many other works out of sight, including works by other Scottish artists like S.J. Peploe and Leslie Hunter.