The Wyvern Company were really no better than a group of
medieval thugs. While on the warpath in France, the company sacked a French
abbey and ran off with (among other things) the sacred Bloodstone ruby,
allegedly collected from the blood of Christ while he hung on the cross. The
ruby was given into the possession of Sir Robert Kilverby, a wealthy merchant,
whose duty it is to produce the Bloodstone twice a year and who is safeguarding
it until such a time as the Wyvern Company dies off.
That day might come sooner than expected, because somebody
is murdering members of the Wyvern Company one by one. But Sir Robert Kilverby
is also found dead, poisoned inside of a locked room. How was the crime
committed? Lucky for us, Brother Athelstan investigates the matter, and in good
time a second impossibility is thrown in the good brother’s face when a fire is
started from inside of a locked room: how could the culprit have started the
fire without waking the room’s occupant and without disturbing the locked door?








