“Railway lines were constructed over the mountains in the early 19th century but they were of low capacity and unimprovable.”

“The fact that our Council is intent on putting houses on this land has pushed the price of acquisition well beyond its unimproved value.”

“He is the great model of the free artist who follows his own, unimproved road.”

“Still, these are footling changes, and most of the text remains commendably unimproved.”