remove 2 bogus files & reinstate entrance

cave_data/1623-87.html

@@ -21,6 +21,11 @@
   <letter></letter>
 </entrance>
 
+<entrance>
+  <entranceslug>1623-87b</entranceslug>
+  <letter></letter>
+</entrance>
+
 <explorers>CUCC 1980, 1987</explorers>
 <underground_description>Horizontal entrance at base of small cliff at head of dry valley, leads over peaty infill to a pitch head. Cross first hole and descend second, 30m to large chamber. To left is unsurveyed inlet ending too small, while to right is head of very steeply descending phreatic-tube-like pitch of 15m vertically (20m+ of rope). This is a little thrutchy to start, but opens out, and ends in a short climb.</p><div class="centre"><a name="p2" href="others/l/87-1.htm"><img alt="(mono photo - 63k)" src="others/t/87-1.jpg" width="134" height="200" /></a> Head of Second pitch <a href="/1623/others/l/87-2.htm"><img alt="(mono photo - 41k)" src="/1623/others/t/87-2.jpg" width="134" height="200" /></a></div><p>A further 15m pitch follows, hanging clear of a wall made up mainly of boulders. A way on across the head of the final pitch appears too tight. Hole in floor is last pitch, of 33m, which has a boulder 10m high in it, and you can descend either side. Draught is lost into a small passage which you could reach by bolting, but it seems a little pointless.</p><p>There is a 1987 extension, but I can't make much sense of the logbook description.</underground_description>
 <equipment></equipment>