differs from tension, or as much as red
differs from green. Therefore we have appealed to you for help, knowing
that we could do but little alone. Alcantro and Fedanzo will supervise
the construction of the generators of the various fields from these
calculations. Dol Kenor will correlate power and electricity to and
with the fields. Westfall and I will help work out the theoretical
difficulties as they arise. Pyraz Amonar, who can devise and build a
machine to perform any conceivable mechanical task, will help us all
in the many mechanical difficulties we shall certainly encounter.
Discussion of any point is now in order."

* * * * *

Step by step and equation after equation the calculations and plans
were gone over, until every detail was clear in each mind. Then the men
bent to their tasks; behind them not only the extraordinarily complete
facilities of that gigantic workshop which was the _Sirius_; but also
the full power of the detachment of police--the very cream of the young
manhood of the planet. Week after toilsome week the unremitting labor
went on, and little by little the massive cruiser of the void became
endowed with an offensive and defensive armament incredible. An armament
conceived in the fertile and daring brain of a sheer genius, guided only
by the knowledge that such things were already in existence somewhere;
reduced to working theory by a precise, mathematical logician;
translated into fields of force by the greatest known experts; powered
by the indefatigable efforts of an electrical wizard; made possible by
the artful mechanical devices of the greatest inventor that three worlds
had ever known! Thus it was that they approached Ganymede, ready, with
blanketing screens full out, save for one narrow working band, and
with a keen-eyed observer at every plate. When even the hyper-critical
Westfall was convinced that their preparations were as complete as they
could be made with the limited information at hand, Brandon directed a
beam upon the satellite and tapped off a brief message:

"stevens ganymede will arrive in about ten hours direct carrier beam
toward sun we can detect it and will follow it to wherever you are
sirius."

"ipv sirius," came the reply, "everything here, all x glad to see you
thanks newton and stevens."

Brandon, at the controls, scanning his screens narrowly, dropped the
vessel down to within a mile or two of the point of origin of Stevens'
c