diff --git a/parsers/people.py b/parsers/people.py
index dd4d896..2d7c5b0 100644
--- a/parsers/people.py
+++ b/parsers/people.py
@@ -75,7 +75,8 @@ def troggle_slugify(longname):
     slug = slug.replace('&', '') # otherwise just remove the &
     slug = slug.replace(';', '') # otherwise just remove the ;
     slug = re.sub(r'<[^>]*>','',slug) # remove <span-lang = "hu">
-
+    slug=slug.strip("-") # remove spare hyphens
+    
     if len(slug) > 40: # slugfield is 50 chars
         slug = slug[:40]
     if slug in slug_cache: 
@@ -237,6 +238,13 @@ Gpersonexpeditionnamelookup = {}
 
 def GetPersonExpeditionNameLookup(expedition):
     """Yes this should all be in an editable text file, not in the body of the code. Sorry.
+    
+    This uses the existing database records of everone on an expedition to construct a dictionary
+    indexedby every possible pseudonym or alias that the person might be known by.
+    
+    This dictionary is used when parsing logbooks and survex files to identify who is being
+    referred to, when the name written in the logbook is e.g. "Mike TA" == "Mike The Animal"
+    == "Mike Rickardson".
     """
     global Gpersonexpeditionnamelookup