been done.

Calhoun fumed to himself.

The world of Weald Three grew brighter and brighter and became a disk.
The disk had icecaps and a reasonable proportion of land and water
surface. The ship decelerated, voices notifying observation from the
surface, and the little ship came to a stop some five planetary
diameters out from solidity. The landing field's force-field locked on
to it, and its descent began.

The business of landing was all very familiar, from the blue rim which
appeared at the limb of the planet from one diameter out, to the
singular flowing-apart of the surface features as the ship sank still
lower. There was the circular landing-grid, rearing skyward for nearly
a mile. It could let down interstellar liners from emptiness and lift
them out to emptiness again, with great convenience and economy for
everyone.

It landed the Med Ship in its center, and there were officials to
greet Calhoun, and he knew in advance the routine part of his visit.
There would be an interview with the planet's chief executive, by
whatever title he was called. There would be a banquet. Murgatroyd
would be petted by everybody. There would be painful efforts to
impress Calhoun with the splendid conduct of public health matters on
Weald. He would be told much scandal.

He might find one man, somewhere, who passionately labored to advance
the welfare of his fellow humans by finding out how to keep them well
or, failing that, how to make them well when they got sick. And in two