diff --git a/apps/routerconsole/java/src/net/i2p/router/sybil/Analysis.java b/apps/routerconsole/java/src/net/i2p/router/sybil/Analysis.java
index 056789cdc..59852a113 100644
--- a/apps/routerconsole/java/src/net/i2p/router/sybil/Analysis.java
+++ b/apps/routerconsole/java/src/net/i2p/router/sybil/Analysis.java
@@ -67,6 +67,7 @@ public class Analysis extends JobImpl implements RouterApp {
     public static final String PROP_BLOCK = "router.sybilEnableBlocking";
     public static final String PROP_NONFF = "router.sybilAnalyzeAll";
     public static final String PROP_BLOCKTIME = "router.sybilBlockPeriod";
+    public static final String PROP_REMOVETIME = "router.sybilDeleteOld";
     private static final long MIN_FREQUENCY = 60*60*1000L;
     private static final long MIN_UPTIME = 75*60*1000L;
 
@@ -133,6 +134,7 @@ public class Analysis extends JobImpl implements RouterApp {
             try {
                 _log.info("Storing analysis");
                 _persister.store(now, points);
+                _persister.removeOld();
                 _log.info("Store complete");
             } catch (IOException ioe) {
                 _log.error("Failed to store analysis", ioe);
@@ -151,6 +153,7 @@ public class Analysis extends JobImpl implements RouterApp {
         changeState(STARTING);
         changeState(RUNNING);
         _cmgr.register(this);
+        _persister.removeOld();
         schedule();
     }
 
diff --git a/apps/routerconsole/java/src/net/i2p/router/sybil/PersistSybil.java b/apps/routerconsole/java/src/net/i2p/router/sybil/PersistSybil.java
index 23ad7f3b0..fde9c8ceb 100644
--- a/apps/routerconsole/java/src/net/i2p/router/sybil/PersistSybil.java
+++ b/apps/routerconsole/java/src/net/i2p/router/sybil/PersistSybil.java
@@ -169,6 +169,37 @@ public class PersistSybil {
         return rv;
     }
 
+    /**
+     *  Remove all files older than configured threshold
+     *  Inline for now, thread later if necessary
+     *
+     *  @since 0.9.41
+     */
+    public synchronized void removeOld() {
+        long age = _context.getProperty(Analysis.PROP_REMOVETIME, 0L);
+        if (age < 60*1000)
+            return;
+        long cutoff = _context.clock().now() - age;
+        File dir = new File(_context.getConfigDir(), DIR);
+        File[] files = dir.listFiles(new FileSuffixFilter(PFX, SFX));
+        if (files == null)
+            return;
+        int deleted = 0;
+        for (File file : files) {
+            try {
+                String name = file.getName();
+                long d = Long.parseLong(name.substring(PFX.length(), name.length() - SFX.length())); 
+                if (d < cutoff) {
+                    if (file.delete())
+                        deleted++;
+                }
+            } catch (NumberFormatException nfe) {}
+        }
+        if (deleted > 0 && _log.shouldWarn())
+            _log.warn("Deleted " + deleted + " old analysis files");
+    }
+
+
     /**
      *  Delete the file for a particular date
      *
diff --git a/apps/routerconsole/java/src/net/i2p/router/web/helpers/NetDbHelper.java b/apps/routerconsole/java/src/net/i2p/router/web/helpers/NetDbHelper.java
index ccdb51c0f..8531305b3 100644
--- a/apps/routerconsole/java/src/net/i2p/router/web/helpers/NetDbHelper.java
+++ b/apps/routerconsole/java/src/net/i2p/router/web/helpers/NetDbHelper.java
@@ -240,6 +240,11 @@ public class NetDbHelper extends FormHandler {
                         long val = 24*60*60*1000L * Integer.parseInt(days);
                         toSave.put(Analysis.PROP_BLOCKTIME, Long.toString(val));
                     }
+                    String age = getJettyString("deleteAge");
+                    if (age != null && age.length() > 0) {
+                        long val = 24*60*60*1000L * Integer.parseInt(age);
+                        toSave.put(Analysis.PROP_REMOVETIME, Long.toString(val));
+                    }
                     String enable = getJettyString("block");
                     toSave.put(Analysis.PROP_BLOCK, Boolean.toString(enable != null));
                     String nonff = getJettyString("nonff");
diff --git a/apps/routerconsole/java/src/net/i2p/router/web/helpers/SybilRenderer.java b/apps/routerconsole/java/src/net/i2p/router/web/helpers/SybilRenderer.java
index 0f413732e..f01e6020d 100644
--- a/apps/routerconsole/java/src/net/i2p/router/web/helpers/SybilRenderer.java
+++ b/apps/routerconsole/java/src/net/i2p/router/web/helpers/SybilRenderer.java
@@ -70,6 +70,7 @@ public class SybilRenderer {
     private static final double MIN_CLOSE = Analysis.MIN_CLOSE;
     private static final double MIN_DISPLAY_POINTS = 12.01;
     private static final int[] HOURS = { 1, 6, 24, 7*24, 30*24, 0 };
+    private static final int[] DAYS = { 2, 7, 30, 90, 365, 0 };
 
     public SybilRenderer(RouterContext ctx) {
         _context = ctx;
@@ -134,7 +135,7 @@ public class SybilRenderer {
         Hash us = _context.routerHash();
         Analysis analysis = Analysis.getInstance(_context);
         List<RouterInfo> ris = null;
-        if (mode != 0 && mode != 12 && mode != 13 && mode != 14 && mode != 16) {
+        if (mode != 0 && mode < 12) {
             if (mode >= 2 && mode <= 6) {
                 // review all routers for family and IP analysis
                 ris = analysis.getAllRouters(us);
@@ -302,7 +303,7 @@ public class SybilRenderer {
                    "<table><tr><td>Background analysis run frequency:</td><td><select name=\"runFrequency\">");
         for (int i = 0; i < HOURS.length; i++) {
             buf.append("<option value=\"");
-            buf.append(Integer.toString(HOURS[i]));
+            buf.append(HOURS[i]);
             buf.append('"');
             long time = HOURS[i] * 60*60*1000L;
             if (time == freq)
@@ -328,7 +329,24 @@ public class SybilRenderer {
             buf.append(HelperBase.CHECKED);
         buf.append("></td></tr>\n<tr><td>" +
                    "Minimum threat points to block:</td><td><input type=\"text\" name=\"threshold\" value=\"").append(thresh).append("\"></td></tr>\n<tr><td>" +
-                   "Days to block:</td><td><input type=\"text\" name=\"days\" value=\"").append(days).append("\"></td></tr>\n<tr><td></td><td>" +
+                   "Days to block:</td><td><input type=\"text\" name=\"days\" value=\"").append(days).append("\"></td></tr>\n<tr><td>" +
+                   "Delete stored analysis older than:</td><td><select name=\"deleteAge\">");
+        long age = _context.getProperty(Analysis.PROP_REMOVETIME, 0L);
+        for (int i = 0; i <DAYS.length; i++) {
+            buf.append("<option value=\"");
+            buf.append(DAYS[i]);
+            buf.append('"');
+            long time = DAYS[i] * 24*60*60*1000L;
+            if (time == age)
+                buf.append(" selected=\"selected\"");
+            buf.append('>');
+            if (DAYS[i] > 0)
+                buf.append(DataHelper.formatDuration2(time));
+            else
+                buf.append(_t("Never"));
+            buf.append("</option>\n");
+        }
+        buf.append("</td></tr>\n<tr><td></td><td>" +
                    "<input type=\"submit\" name=\"action\" class=\"accept\" value=\"Save\" />" +
                    "</td></tr></table></form>\n");
         writeBuf(out, buf);