Unfortunately I've had the same experience not finding Glasfurd's chamber.
The confusion came from where to turn right. In an earlier CNCC description I'm sure it said something about take the first right, but the current one reads:
"At the bottom of this pitch a short crawl reaches a low streamway. Follow this downstream for 90m. The passage soon enlarges, and a junction is reached where right leads to the October Series (rather unpleasant so best ignored). Continue downstream for another 50m. The stream then starts to cut down as a canyon as it approaches the next pitch. As the stream approaches the next pitch, there is a short dry oxbow on the right containing a small crawl which leads for 50m to a junction in a large passage. Left goes to a sump but right follows along a fine passage to Glasfurd’s Chamber, a beautifully decorated grotto. Please take extreme care here to avoid damage to the vulnerably located formations! Do not confuse the October Series with the route to Glasfurd’s Chamber! This is very easily done (including by the author of this guide) and is definitely not recommended!"
Which is much clearer. All the grim wallowing is in the October series. Though there are a couple of low slots to wiggle through, there's none of that sort of aqueous malarkey on the way to Glasfurd's!
There are some lovely curtains towards the end, but the final chamber is particularly pretty:
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