The pictures for #6 and #12 were stored on Google Disk, which apparently prohibits hot-linking (inserting a link with a picture address into a forum). Basically, I was able to see the picture, but other couldn't. This is why I said it is very important to have the picture hosted with a reputable image hosting that allows hotlinking.
In any case, I have saved the pictures on my personal Flickr and have uploaded links to them in this thread now, but if owners would like to send me links to larger/better images hosted elsewhere that I can link to, feel free to do so.