Now, instead of
coins we'll substitute postage-stamps.
English stamps, nine of them being all of different values, and the
Stick two of them in one division and one in each of the
others, so that the square shall this time add up ninepence in the
directions as before."
"Here you are!"
cried Grigsby, after he had been scribbling
for a few
minutes on the back of an envelope.
"Are you sure
that there is a current English postage-stamp of
"For the life of
me, I don't know. Isn't there?"
"That's just like
the Professor," put in Hawkhurst. "There
never was such
a 'tricky' man.
You never know when you have got to the bottom of his
Just when you make sure you have found a solution, he trips
up over some little point you never thought of."
"When you have
done that," said the Professor, "here is a much
Stick English postage stamps so that every three divisions in
line shall add up alike, using as many stamps as you choose, so long as
they are all of different values.
It is a hard nut."