It was curious, this instinctive aversion she felt to being shut inby trees especially; a kind of claustrophobia almost; probably due, as has been said, to the days in India when the trees took her husband off and surrounded him with dangers.

Claustrophobia.

Claustrophobia.

Then poor old Tubby, who hasn't recovered from his 1918 dose of shell-shock, got a go of claustrophobia and felt he simply had to get out of the train.