The new pic you uploaded to Wikipedia is the pic I had already uploaded to my phone for reference!
By the way, I've never gone through the process of updating a Wikipedia article. I'm glad you changed it, but it's a little discomforting to know that one can change an entry so easily and quickly.
I actually only linked those images, which were already available from the commons. (I initially forgot, but I've since added a photo credit to my original post to comply with the terms under which these images are licensed.) As you're probably aware, there are
a lot of images of knots available with a fairly liberal license for reuse up there on the commons. While the categorization is a bit haphazard many are quite useful for reference purposes. BTW, to see the second page of subcategories click the "(next 200)" link. Still a lot of categorization work to do, though...
As far as the ease of changing Wikipedia articles, it does carry risks but it also makes correcting errors and less-than-ideal content quite easy. I've found that most articles eventually stabilize as they reach a reasonable level of completion. I'd say the halter hitch article isn't there yet.
Regarding the lock pic, can you please explain the context? If I'm going to go through all that trouble, then I'm thinking I'd rather tie a hitch that's more secure than the halter in the first place.
That locked-off image does not really present what I think would be used in practice. I think it's simply a method to shorten the lead, say to keep it out of the mud (or other barnyard hazards
), while at the same time adding a bit of stability and retaining the quick release properties. For instance here's another demonstration showing a slipped half hitch with one additional chain sinnet pass...
http://www.youtube.com/watch?v=t0LEeOjBfFEI'm no equestrian, but it would seem maintaining quick-release even under heavy tension is at least as important as overall security in this kind of application.