How do I free up space (delete things) taken up by my iPad's Photo Library? I have an older iPad that I got in 2012. The iOS version is 8.1

A lot of space is used by my "Photos &amp; Camera".  I clicked on my "Camera" icon and after clicking on its gallery, I clicked the "Trash" icon next to every item in there.  However, when I go into my Storage Settings, and drill down to my "Photos &amp; Camera", it says "8.9 GB," but there's no where that allows me to delete the items used by the storage.

How do I actually delete things?  That is, I'm trying to free up storage, which I can't seem to do.
On the newer iOS versions, Apple initiated a delayed trash. This means that things are only truly deleted after they've been in the trash for 30 days.

To force things to delete, go to the photos app, then choose albums in the bottom right corner. Scroll down until you find the "recently deleted" album and click on it. Then click select and choose whether you want to delete or recover either all or just a few of the photos.