Source code of Saved Items tag collection?

I don’t know if my title is worded right or if it’s even the right question. Basically: I have a Saved Items tag (“Art”) that has tons of Tumblr picture posts. I’d like to find a way to get the URLs for these images.

All I really need is the HTML of the panel where the Feed loads, as I could use grep to extract the image URLs. I thought I’d just scroll down a fair bit, use View Source or Inspect Element to get the code, then repeat. However, I can’t figure out a way to actually view any code for this section. I assume complex Ajax magicks I can’t comprehend are involved.

This isn’t really a question for Samuel as much as just the community at large. Please note that I’m just trying to get at the code itself for the URLs…I’m NOT asking how to easily download the images themselves.