If it reproduced accurately on the forum, I would say that it would have benefited with an intensifier bath after development. A brief dunk into a weak bath of Potassium dichromate would deepen the shadows and given more apparent contrast.
"Modern" cyanotype formulas toss in a little Potassium dichromate in the mix (along with Oxalic acid).
Papers that are buffered with an alkiline can be used if given a good soak in a 2% Oxalic acid bath -- I do this for platinum/palladium printing on some papers.
Keep it up!
Vaughn
Thanks for the advice, I will say that at this stage of the game I'm going to stick with straight prints until I get a better feel for where I'm going with this. Once I've got to that stage I'll try toning/intensifying etc.
Cheers
Martin