diff --git a/cave_data/1623-171.html b/cave_data/1623-171.html
index f8365d1dc..c52c4b127 100644
--- a/cave_data/1623-171.html
+++ b/cave_data/1623-171.html
@@ -34,7 +34,7 @@ the form documented at
   <letter>b</letter>
 </entrance>
 
-<explorers>CUCC 1990, surveyed Olly and Jenny 2016.</explorers>
+<explorers>CUCC 1990, surveyed Olly and Jenny 2016: <a href="/logbookentry/2016-07-08/2016-07-08a">logbook 2016-07-08a</a></explorers>
 <survex_file>caves-1623/171/171.svx</survex_file>
 <underground_description>Subhorizontal phreatic tube trending 154&deg;. Multiple entrances and windows with total passage length in excess of 150m. Passage generally elliptical: 5m wide and 3m high.</p><p>Along the fault to the north are numerous choked shafts with a maximum depth of 5m.
 <p>
diff --git a/entrance_data/1623-171a.html b/entrance_data/1623-171a.html
index f622c8686..ad6d86e36 100644
--- a/entrance_data/1623-171a.html
+++ b/entrance_data/1623-171a.html
@@ -30,7 +30,7 @@ though, you do not need to do a data import as it happens automatically -->
 <img src='/1623/171/t/IMG_20240725_134051.jpg' />
 </a>
   <br />
-  171 entrance in 1990 and 2024
+  171 entrance in 1990 (2016?) and 2024
 
   <p>
 
@@ -42,7 +42,7 @@ though, you do not need to do a data import as it happens automatically -->
 <img src='/1623/171/t/IMG_20240725_134051-tag.jpg' />
 </a>
 <br />
-  171 old entrance: showing painted number in 1990 photo,
+  171 old entrance: showing painted number in old photo,
 and showing tag still in place in 2024.</entrance_description>
 <explorers>CUCC 1990.</explorers>
 <location_description></location_description>