It must be the purer air.
"Somehow Good"
William de Morgan
The water was however excellent, purer indeed than any we had seen for many days, and we hastened back to the party at Cadduldury, which place we only arrived at as darkness came on, so that Piper had nearly lost his way.
"Journal of an Expedition into the Interior of Tropical Australia In Search of a Route from Sydney to the Gulf of Carpentaria (1848) by Lt. Col. Sir Thomas Livingstone Mitchell Kt. D.C.L. (1792-1855) Surveyor-General of New South Wales"
Thomas Mitchell
But in these shorter poems, so far as he has had any models, he has tried to emulate the perfection attained in the older and purer era of Greek inspiration.
"The Roman Poets of the Republic"
W. Y. Sellar