"What's the longitude?" asked Joby.

"That doesn't concern us."

"'Tis west o' Grinnidge, I suppose?" Joby knew very little about
navigation, and wanted to make the most of it.

"West o' Penryn," said Sam, very sharp and short. "'Twasn' Grinnidge
Fair we started from."

But presently he sings out "Here we are!" and Joby saw a white line,
like a popping-crease, painted across the blue sea ahead of them.
First he thought 'twas paint, and then he thought 'twas catgut, for
when the keel of their boat scraped over it, it sang like a bird.

"That was the Equator," said Sam. "Now let's see if your eyes be any
better."

But when Joby tried them, what was his disappointment to find the
cast as bad as ever?--only now they were slewing right the other way,
towards the South Pole.

"I never thought well of this cure from the first," declared Sam.
"For my part, I'm sick and tired of the whole business!" And with
that he bounced up from the thwart and hailed a passing shark and
walked down its throat in a huff, leaving Joby all alone on the wide
sea.

"There's nice brotherly behaviour for you!" said Joby to himself.
"Lucky he left his walking-stick behind. The best thing I can do is