diff --git a/core/views/statistics.py b/core/views/statistics.py
index 5231b31..f56b821 100644
--- a/core/views/statistics.py
+++ b/core/views/statistics.py
@@ -15,7 +15,50 @@ from troggle.parsers.people import GetPersonExpeditionNameLookup, foreign_friend
 the status of data inconsistencies
 """
 
+def svxfilewild(request, year=None):
+    """Looks for survexfiles which do not have an associated
+    wallet, per year
+    """
+    legsbyexpo = []
+    addupsurvexlength = 0.0
+    addupsurvexlegs = 0
+    
+    if not year:
+        expos = Expedition.objects.all()
+    else:
+        expos = Expedition.objects.filter(year=year)
+        
+    for expedition in expos:
+        survexblocks = expedition.survexblock_set.all()
+        legsyear = 0
+        survexleglength = 0.0
+        for survexblock in survexblocks:
+            survexleglength += survexblock.legslength
+            legsyear += int(survexblock.legsall)
+        addupsurvexlength += survexleglength
+        addupsurvexlegs += legsyear
+        legsbyexpo.append((expedition, {"nsurvexlegs": legsyear, "survexleglength": survexleglength}))
+    legsbyexpo.reverse()
 
+    svxwild = []
+    for expedition in expos:
+        survexblocks = expedition.survexblock_set.all()
+        for sb in survexblocks:
+            # print(f"{sb=}")
+            if sb.scanswallet == None:
+                if sb.name != "rootblock":
+                    svxwild.append(sb)
+                    print(f"  WILD {sb.survexfile} {sb.date}")
+            # else:
+                # print(f"  TAME {sb.survexfile}")
+
+    return render(request, "survexfilewild.html", 
+        {"addupsurvexlength": addupsurvexlength / 1000, 
+        "legsbyexpo": legsbyexpo, 
+        "nsurvexlegs": addupsurvexlegs,
+        "svxwild": svxwild}
+    )
+    
 def therionissues(request):
     """Page displaying contents of a file produced during data import"""
     logname = "therionrefs.log"
diff --git a/templates/survexfilewild.html b/templates/survexfilewild.html
new file mode 100644
index 0000000..36cfbc3
--- /dev/null
+++ b/templates/survexfilewild.html
@@ -0,0 +1,44 @@
+{% extends "base.html" %}
+{% block title %}Survex files which have no wallets{% endblock %}
+
+{% block content %}
+
+<h1>'Wild' Survex files</h1>
+
+<p>These are survex files which have NO ATTACHED WALLET.
+<br />
+i.e. they have no *REF line which refers to the wallet holding the raw data for this survey.
+<p>WORK IN PROGRESS
+
+<table>
+<tr><th>Survex Blocks</th><th>date</th><th>survex file</th><th>surveyed length</th></tr>
+{% for sb in svxwild %}
+<tr>
+  <td style="text-align:center"> {{ sb }} </td>
+  <td style="text-align:center"> {{sb.date }} </td>
+  <td style="text-align:left"> <a href="{% url "svx" sb.survexfile.path %}">{{sb.survexfile.path}}</a> </td>
+  <td style="text-align:center"> {{sb.legslength|floatformat:"1g" }}m </td>
+</tr>
+{% endfor %}
+</table>
+<br />
+<br />
+<table>
+<tr><th>Year</th><th>Survex<br>Survey<br>Blocks</th><th>Survex<br>Survey Legs</th><th>Survex <br>length(m)</th></tr>
+{% for legs in legsbyexpo %}
+<tr>
+  <td style="text-align:center"><a href="{{ legs.0.get_absolute_url }}">{{legs.0}}</a></td>
+  <td style="text-align:center">{{legs.0.survexblock_set.all|length}}</td>
+  <td style="text-align:center">{{legs.1.nsurvexlegs|rjust:"10"|floatformat:"0g"}} </td>
+  <td style="text-align:right">{{legs.1.survexleglength|floatformat:"0g"}}</td>
+</tr>
+{% endfor %}
+</table>
+
+
+<p>These are uncorrected tape lengths which include pitches and duplicates but exclude splays or surface-surveys. 
+<p>One Survex Survey Block is one *begin/*end block of data in a survex file. 
+Some files from other caving clubs may have a convention of using many more blocks per file than we do, e.g. if the 
+file is exported from other software into survex format.
+
+{% endblock %}
\ No newline at end of file
diff --git a/urls.py b/urls.py
index 2e13eb8..312df49 100644
--- a/urls.py
+++ b/urls.py
@@ -192,6 +192,9 @@ trogglepatterns = [
     path('survexfile/<path:survex_file>.err', survex.err,        name="err"), 
     path('survexfile/<path:survex_cave>',     survex.survexcavesingle,    name="survexcavessingle"),
 
+    path('survexfilewild',                statistics.svxfilewild, name="svxfilewild"),
+    path('survexfilewild/<int:year>',     statistics.svxfilewild, name="svxfilewild"),
+
 
 # The survey scans in the wallets. This short-cuts SCANS_URL which is not used anymore and is defunct
     path('survey_scans/',                    allscans,    name="allscans"), # all the scans in all wallets