Wall Of The Citadel - stages 1 and 2

I enjoyed painting all the reds in the last picture so I have decided to do another one but this time a landscape. It was originally going to be an Orientalist picture of an oasis but somehow it changed into a scene of a river running by the side of a walled citadel. I want it to look hot and dusty and plan to keep it within a pretty narrow colour range of reds, oranges and yellows. 
I initially gave the linen canvas a wash of yellow (apart from the position of the sun) before "drawing" it up with a small bristle brush using a mix of Permanent Orange and Burnt Sienna thinned with Liquin and turpentine.
In stage two I washed in some tone with a rag using the same paint mixture.