Oh Man, I got you!
This is a Hunter HFS40. I used to sell them until they completely went out of business in 2001. They were bought by Martin Industries in the late 90's, and we all know how that went. There were some models that were traded under the Martin or Martin Gas brand name.
Unfortunately, they went under in an era before everyone had digitized copies of the manuals, so I was not able to find a manual in an online search.
The logs are set up incorrectly, as the top cross log yours has on the left, actually fit on the knob on the right of the big front log, the other end sat on the burner pan and the rear log sits on that small log at the left, and angles down ward towards the left hand side.
I believe the bottom ash pan has to come off to reveal the screws for the glass panes (i'm sorry, but this wasn't as popular a unit for us, so I don't this this specific model that often in my service travels). You might try Target Wholesale (866-9TARGET) as I know they bought up their old parts inventory. I'm sure many of the parts that aren't universal may be gone by now, but they might be able to help source a manual.