Where can you find the poem by Gavin Ewart that begins i want him to have one last summer?

A 14-Year-Old Convalescent Cat in Winter

I want him to have another living summer,

to lie in the sun and enjoy the douceur de vivre -

because the sun, like golden rum in a rummer,

is what makes an idle cat un tout petit peu ivre -

I want him to lie stretched out, contented,

revelling in the heat, his fur all dry and warm,

an Old Age Pensioner, retired, resented

by no one, and happinesses in a beelike swarm

to settle on him - postponed for another season

that last fated hateful journey to the vet

from which there is no return (and age the reason),

which must come soon - as I cannot forget.

Gavin Ewart (1916-95)