and itâs called Cleopatraâs Needle. Get it? Itâs a needle without an eye.â
âWow!â Xander exclaimed.
âIt was in London when the amulet was stolen, and it was something that people would know about. The riddle must be from Sherlockâs time and not a translation of an Egyptian saying or anything, because the Egyptians didnât call the obelisk Cleopatraâs Needle.â
âThat means itâs a clue about where the amulet is. It
must
be something that Amin wrote and left for his descendants to find!â
As soon as they got home, Xena checked out the guideâs information. âListen to this, Xan,â she said breathlessly. âThereâs another obelisk in Parisâthatâs across the Channel, not across the sea.
But
thereâs a third obelisk in New York, and itâs also called Cleopatraâs Needle. That must be the âsister across the seaâ!â
âNow weâre getting somewhere!â Xander said, but then his face fell. âAre we supposed to go to New York? How can we do that?â
âLetâs look at the riddle again.â
They went into Xanderâs room and pulled the fragile piece of paper out of its envelope. Xander read:
âI am a needle but cannot sew.
I have no eye and cannot see.
I face my sister across the sea,
and toward my sister you must go.â
âAha!â Xena said. âWeâre supposed to go
toward
the other obelisk, not all the way
to
it. And lookâthe writing under it says âfive hundred yardsâ! So weâre supposed to start off at the Cleopatraâs Needle in London and go five hundred yards in the direction of New York, which is west!â
Xander pulled his map out of his pocket. He figured out roughly five hundred yards due west from the Egyptian monument. The spot was in a jumble of buildings, and it was hard to tell exactly which one was meant. âAnyway,â he said, âNew York isnât exactly west from London. Itâs south too.â
âBut if we get a globe and draw a line between London and New York, it wonât be accurate enough to tell us whatâs five hundred yards away!â This sounded like one of those impossible word problems in math:
If London is X miles north and Y miles east of New York, what will be the angle of the line that you draw between the two cities, relative to the equator, and what will you find five hundred yards along that line?
Xena was good at math, except for word problems. They mixed two different thingsâmath and languageâand her orderly mind had a hard time with that.
Xander smiled in the infuriating way thatmeant he had figured something out ahead of her. âBe right back.â He disappeared into the living room, and she heard him rummaging around in the gadget box. He came back wearing the GPS watch that their mother had said was too small to be useful.
âLondon. Cleopatraâs Needle,â Xander said into the watch. They heard a few beeps. âNew York. Cleopatraâs Needle.â More beeps. âConnect.â Then, âFive hundred yards. Enlarge. Aha!â He showed Xena the small screen where a tiny red dot blinked on the map of London. âThatâs the spot!â
She squinted at it. âOkay! Letâs go!â
They were on their way out the door when their father appeared from the kitchen. âWhoa! Where do you two think youâre going?â
âOut, Dad.â Xena was impatient. âWeâre working on a case, and we just got an important clue aboutââ
âHave you finished your homework?â
Xena sighed in exasperation. âNot all of it.â
Actually, she hadnât even started it.
âItâs okay,â Xander said. âIâll go. Itâs just a few Tube stops away.â
âNo, you wonât,â their father said. âNot by yourself on the Underground. Besides, itâs