Deep down, though, profound mistrusts lingered from the war years, and Mr. Mugabe began to pay heed to reports circulating at the time that General Walls had indeed plotted against him.
And not without good reason:
http://www.rhodesia.nl/quartz.htm

I remember many of us on the ground were annoyed when Quartz was cancelled, but we were young and we didnt really give any thought to what would happen in the long term - Pointless? Perhaps, but then again seeing what has happened since, perhaps not, hind-sight is a perfect science.

I.R.