Daneel's robots had been using this technique to slip onto the capital for untold generations.
I have seen untold generations come and go; faces flit before me like snowflakes as I sit here.
It is your nature to kill, and you are simply reacting as untold generations of murderous progenitors would have reacted.
The chirpsithtra claim to have ruled the galaxy for untold generations.
She had not had subservience bred into her for untold generations.
"My people were there for generations untold."
Long ago one had borrowed the other's written language, and, untold generations before that, they had diverged from the common Mongol stock.
In many cultures, drums carry ancient, sacramental rhythms, transmitted through untold generations.
After untold generations the strange, glossy cloth was beginning to show signs of wear, and the Scientist wore it only for official functions.
The animal reflexes were turned off, and for the first time in untold generations, a cheela went to sleep.