Frank Sinatra once spotted him in a restaurant and asked for his autograph.

Once spotted it was all about getting the idea put into practice.

But difficult to spot though they might be, once spotted they were usually doomed.

The red fronted buildings once spotted the Toronto landscape, but have since perished.

They are high above street level but, once spotted, they make the building hard to forget.

Those who wondered about this practice were answered when he once spotted someone about to faint from the weakness of the fast.

Haven't seen any snakes, but once spotted a lizard.

And those, once spotted, would be useless to any investigator.

I once spotted a pink one and, horrors, a plastic one.

Officials say a pothole, once spotted, now has an average lifespan of only two days.