Effects to Help Find Volcanoes
These effects are used to help find a volcano. Vulcan's Glass and Scribe of All That I Can See are enchanted items that could be used by a team of grogs to help their master find a volcanic site. Scent of Ash and Trail of Ember are spells, but, of course, your characters could invent similar effects as items if you wish.
Scent of Ash
InAu 15
The caster can smell and identify, on the breath of the air, the ash that has carried from volcanoes. This is enough information for the caster to determine the approximate direction and distance to each of the volcanoes he detects. A dormant volcano can be detected in this way from within one league (three miles), a volcano that has erupted within the last 100 years can be detected from within seven leagues (21 miles), and a volcano that has erupted in the last season can be detected from within 100 miles. Dormant volcanoes are
detectable in this way because ash from their violent eruption is still present in the environment. The ash may have fallen to the ground, but some small (but detectable via Hermetic magic) fraction has been
R: Personal, D: Concentration, T: Smell
Of course, the huge plume of ash from a large on-going eruption can easily be identified without the aid of magic from many hundreds of miles away.
blown up into the air again.
(Base 4, +1 Concentration, +2 Smell) Required Lab Total to invent spell: One Season (30), Two Seasons (23), Three Seasons (20), Four Seasons (19).
Scribe of All That I Can See
InTe(Aq)(He) 25
Pen: 0, 1 use per day, item maintains Concentration
R: Touch, D: Concentration, T: Vision

It takes 1 Diameter to draw what can be seen from a tree-top or church tower, and it takes 3 Diameters to draw what can be seen from a mountaintop, or by a flying character. If what is being mapped includes something complicated (like the streets of a city) it takes an additional 3 Diameters to draw the map.
The map produced with the aid of the quill can be used in conjunction with spells such as Trail of Ember and The Inexorable Search (ArM5, page 131). Having the map also gives a character a +3 bonus to Area Lore rolls made to navigate the terrain depicted.
The character needs to provide parchment and ink (or similar materials), and he must be literate if he wishes to annotate the map. If the map is not annotated it can only be used by a character who successfully makes an (appropriate) Area Lore roll against an Ease Factor of 12. If the map is annotated, it can be used by any character literate in the language of annotation. The character who created the map can always use it, even if it is not annotated.
The requisites are required so that rivers and forests can be mapped too.
(Base 2, +1 Touch, +1 Concentration, +4 Vision, free requisites; + 5 item maintains Concentration)
Required Lab Total to invest effect: One Season (50), Two Seasons (38), Three Seasons (34), Four Seasons (32).

Trail of Ember
InTe 20
R: Arcane, D: Momentary, T: Individual The caster of this spell throws a piece of volcanic rock onto a map. The rock lands on the location of the volcano it was expelled from. If the volcano's location is not bounded by the map, then the rock rolls off in the direction that the volcano lies.
If the rock thrown onto the map is not volcanic, then it just lands somewhere at random. The caster can confirm this by casting the spell several times: a volcanic rock will always land on the same spot on the map.
Note that a volcanic rock created via Creo Terram magic will not reveal what volcano it came from when thrown onto the map with the Trail of Ember spell. This is because such a magically created volcanic rock did not in fact come from a volcano.
(Base 4, +4 Arcane)
Required Lab Total to invent spell: One Season (40), Two Seasons (30), Three Seasons (27), Four Seasons (25).
Vulcan's Glass
InTe 20
Pen: 0, 1 use per day
R: Touch, D: Concentration, T: Vision
This enchanted mirror allows the user to identify the volcanoes in a mountain range. The user turns his back to the mountains, and studies the reflected image of the mountain range in the mirror. The reflected images of the volcanoes glow with a red aura.
This spell works because whether or not a particular mountain is a volcano is a visible property that can be distinguished by someone with appropriate skill. This spell compensates for the lack of appropriate skill in the observer.
(Base 2, +1 Touch, +1 Concentration, +4 Vision)
Required Lab Total to invest effect: One Season (40), Two Seasons (30), Three Seasons (27), Four Seasons (25).