It's infectious.

I catch myself smiling, and I'd jolly well frown as a rule if any one yanked a basket into my back." "I think it's the climate," remarked Irene.

"In a London tram most faces don't look too cheerful, but with this sky overhead people are simply chirping like crickets.

It's like a perpetual summer holiday." The car was rattling along the steep coast road through miles of glorious scenery.

On the left was an ultramarine sea, with white-sailed boats, and to the right lay cliffs and olive groves.