diff --git a/core/views/caves.py b/core/views/caves.py
index bd1de70..90a8451 100644
--- a/core/views/caves.py
+++ b/core/views/caves.py
@@ -453,6 +453,9 @@ def edit_entrance(request, path="", caveslug=None, entslug=None):
     Warning. This uses Django deep magic for multiple forms and the CaveAndEntrance class.
 
     It does save the data into into the database directly, not by parsing the file.
+    
+    GET RID of all this entranceletter stuff. Far too overcomplexified.
+    We don't need it. Just the entrance slug is fine, then check uniqueness.
     """
 
     try:
@@ -479,23 +482,35 @@ def edit_entrance(request, path="", caveslug=None, entslug=None):
         
     if caveAndEntrance.entranceletter == "" and cave.entrances().count() > 0 :
         # this should not be blank on a multiple-entrance cave
-        # but it doesn't trigger the entrnce letter form unless entletter has a value
+        # but it doesn't trigger the entrance letter form unless entletter has a value
         entlettereditable = True 
       
     print(f"{entlettereditable=}")
+    # if the entletter is no editable, then the entletterform does not appear and so is always invalid.
        
     if request.POST:
         print(f"POST Online edit of entrance: '{entrance}' where {cave=}")
-        form = EntranceForm(request.POST, instance=entrance)
-        entletterform = EntranceLetterForm(request.POST, instance=caveAndEntrance)
-        if form.is_valid() and entletterform.is_valid():
-            entrance = form.save(commit=False)
-            ce = entletterform.save(commit=False)
-            print(f"- POST {caveslug=} {entslug=} {ce=} {entletterform.cleaned_data['entranceletter']=} {path=}")
+        entform = EntranceForm(request.POST, instance=entrance)
+        if not entlettereditable:
+            entranceletter = caveAndEntrance.entranceletter
+            ce = caveAndEntrance
+        else:
+            entletterform = EntranceLetterForm(request.POST, instance=caveAndEntrance)
+            if entletterform.is_valid():
+                ce = entletterform.save(commit=False)
+                entranceletter = entletterform.cleaned_data["entranceletter"]
+            else:
+                print(f"- POST INVALID {caveslug=} {entslug=} {path=} entletterform invalid.")
+                return render(request, "errors/badslug.html", {"entletter problem in edit_entrances()"})
+        # if entform.is_valid() and entletterform.is_valid():
+        if entform.is_valid():
+            entrance = entform.save(commit=False)
+            
+            print(f"- POST {caveslug=} {entslug=} {entranceletter=} {path=}")
             if entslug is None:
-                if entletterform.cleaned_data["entranceletter"]:
-                    slugname = cave.slug() + entletterform.cleaned_data["entranceletter"]
-                    print(f"- POST letter {entletterform.cleaned_data['entranceletter']=}")
+                if entranceletter:
+                    slugname = cave.slug() + entranceletter
+                    print(f"- POST letter {entranceletter=}")
                 else:
                     slugname = cave.slug()
                 entrance.slug = slugname
@@ -524,6 +539,8 @@ def edit_entrance(request, path="", caveslug=None, entslug=None):
             print(f"- POST WRITE letter: '{ce}' {entrance=}")
             write_and_commit([entrance_file, cave_file], f"Online edit of entrance {entrance.slug}")
             return HttpResponseRedirect("/" + cave.url)
+        else: # one of the forms is not valid
+            print(f"- POST INVALID {caveslug=} {entslug=} {path=} entform valid:{entform.is_valid()} entletterform valid:{entletterform.is_valid()}")
             
     else: # GET the page, not POST, or if either of the forms were invalid when POSTed
         entletterform = None
diff --git a/templates/eastings.html b/templates/eastings.html
index 399cb97..e759c42 100644
--- a/templates/eastings.html
+++ b/templates/eastings.html
@@ -70,8 +70,35 @@ Such converted eastings and northings are <em>in italics</em> in the table below
 </tr>
 {% endfor %}
 </table>
+<p>and what those stations are:
+<table>
+<tr><th>Cave</th><th>tag</th><th>tag x</th><th>tag y</th><th>tag exact</th><th>exact x</th><th>exact y</th><th>tag other</th><th>other x</th><th>other y</th></tr>
+{% for ent in ents %}
+<tr>
+  <td style="text-align:left">
+  {% for c in ent.cavelist %}
+    <a href="/{{c.url}}">
+    {% if c.official_name %}
+        {{c.official_name|safe}}
+    {% else %}
+        <em>{{c|safe}}</em>
+    {% endif %}</a><br>
+  {% endfor %}</td>
+ 
+  <td style="text-align:right">{{ent.tag_station}}</td>
+  <td style="text-align:right">{{ent.tag_ts.x|floatformat:0}}</td>
+  <td style="text-align:right">{{ent.tag_ts.y|floatformat:0}}</td>
+  <td style="text-align:right">{{ent.exact_station}}</td>
+  <td style="text-align:right">{{ent.tag_es.x|floatformat:0}}</td>
+  <td style="text-align:right">{{ent.tag_es.y|floatformat:0}}</td>
+  <td style="text-align:right">{{ent.other_station}}</td>
+  <td style="text-align:right">{{ent.tag_os.x|floatformat:0}}</td>
+  <td style="text-align:right">{{ent.tag_os.y|floatformat:0}}</td>
+ </tr>
+{% endfor %}
+</table>
 
-<p>and now the GPS equivalents:
+<h3>and now the GPS equivalents</h3>
 <table>
 <tr><th>Cave</th><th>GPS Lat</th><th>GPS Long</th><th>best Lat</th><th>best Long</th><th>tag</th><th>tag Lat</th><th>tag Long</th><th>tag exact</th><th>exact Lat</th><th>exact Long</th><th>tag other</th><th>other Lat</th><th>other Long</th></tr>
 {% for ent in gpsents %}
@@ -103,6 +130,8 @@ Such converted eastings and northings are <em>in italics</em> in the table below
 {% endfor %}
 </table>
 
+<h3>All entrances in Trogggle</h3>
+<p> See also <a href="/entrances">Entrances list</a>.
 <p>But the Entrances - the objects in the troggle system - are not properly connected to the dataset which is the combined set of survex data. They are only linked - and only implicitly - by the tag name. The data in the table below is calculated directly from 
 the assemblage of survex files, including fixed point files, and is probably 'correct'. 
 <p>But which coordinate system are they in ? Read these three articles to find out: