Worship of in other monotheistic religion will also create a Dominion
Aura; but any such is uncommon and localized within the British Isles.
+
+
+Infernal Auras
+==============
+
+Infernal Auras come about as a result of sin, or by action of the
+Infernal powers. Unless something really significant has occured to
+create a large aura then they'll usually be hidden beneath the
+Dominion Aura in towns during the daytime, but they:
+
+Gain a point at night, and additionally on any unholy day (All
+Hallow's Eve).
+
+In Christian Lands they gain a point on the Wednesday before Easter
+until Dusk on Good Friday. After that they temporarily die down to
+zero until Easter Monday then regain their strength over the next
+week.
+
+In Jewish communities they lose one point on the Sabbath provided
+everyone is observing the Sabbath.
+
+
+Faerie Auras
+============
+
+Faerie Auras occur where there are faeries. Or maybe the other way
+around. They're a bit hard to predict because their waning and waxing
+depend on the faeries within them.
+
+A lot of Britain outside the Dominion is fae -- the fens, the moors,
+the dark forests, and the great waterways. In particular if you're
+anywhere where humans rarely but sometimes go then there might well be
+a faerie there.
+
+
+Magic Auras
+===========
+
+Magic Auras exist for a number of reasons:
+
+* Natural Magic (e.g. an ancient copse that isn't faerie)
+* Ancient Man-made things that have been associated with magic for a
+ long time
+* The residues of old powerful magical workings
+* Presence of magical beings
+* Vis
+* More complicated reasons close to "feng shui" can cause small
+ pockets of magical aura even within a city
+
+Casting magic within an aura and using vis in it tends to strengthen
+in. Extracting vis tends to weaken it.