diff --git a/dfhack/modules/Materials.cpp b/dfhack/modules/Materials.cpp
index e0e8da8a7..8f00b96c6 100644
--- a/dfhack/modules/Materials.cpp
+++ b/dfhack/modules/Materials.cpp
@@ -230,6 +230,8 @@ bool Materials::ReadDescriptorColors (vector<t_descriptor_color> & color)
 	uint32_t size = p_colors.size();
 	
 	color.clear();
+	if(size == 0)
+		return false;
 	color.reserve(size);
 	for (uint32_t i = 0; i < size;i++)
 	{
@@ -241,6 +243,7 @@ bool Materials::ReadDescriptorColors (vector<t_descriptor_color> & color)
 		col.b = p->readFloat( p_colors[i] + p->getDescriptor()->getOffset ("descriptor_color_b") );
 		color.push_back(col);
 	}
+	return true;
 }
 
 bool Materials::ReadCreatureTypesEx (vector<t_creaturetype> & creatures)
diff --git a/output/Memory.xml b/output/Memory.xml
index 8be57eb89..5aff6abb2 100644
--- a/output/Memory.xml
+++ b/output/Memory.xml
@@ -433,13 +433,13 @@ size=212
 55/type = MOOD
 56/name = "Strange Mood Jeweller"
 56/type = MOOD
-57/name = "Strange Mood C"
+57/name = "Strange Mood Forge"
 57/type = MOOD
-58/name = "Strange Mood Metal"
+58/name = "Strange Mood Magma Forge"
 58/type = MOOD
-59/name = "Strange Mood E"
+59/name = "Strange Mood Brooding"
 59/type = MOOD
-60/name = "Strange Mood F"
+60/name = "Strange Mood Fell"
 60/type = MOOD
 61/name = "Strange Mood Carpenter"
 61/type = MOOD
@@ -1408,12 +1408,22 @@ map_data_1b60_offset          0x1B9c
         <Offset name="creature_disease_resistance">0x4F0</Offset>
         -->
         <Offset name="creature_current_job">0x390</Offset> <!-- from chmod -->
+        <Offset name="creature_mood_skill">0x394</Offset> the skill that will be increased at the end of the mood (or not)
+        <Offset name="creature_appearance_vector">0x604</Offset> seems to be indexes in the list of possible colors defined in the raws for each group
         <Offset name="creature_artifact_name">0x6D4</Offset>
         <Offset name="creature_labors">0x774</Offset>
         <Offset name="creature_soul_vector">0x0740</Offset>
         <Offset name="creature_default_soul">0x0758</Offset>
         <Offset name="creature_happiness">0x834</Offset>
-        
+
+	Job structure
+	=============
+	<Offset name="job_type">0x4</Offset> seems to be just like the old occupations
+	<Offset name="job_materials_vector">0xa4</Offset>
+
+	Job materials
+	=============
+	<Offset name="job_material_maintype">0x0</Offset> like mood materials, 0=bars, 4=stone, 5=wood, 57=cloth, 54=leather ...
         
         Materials
         =========