https://www.theguardian.com/science/2016/oct/20/israeli-archeologists-discover-titus-breached-jerusalem-walls
Thanks, David: this has been a long time in the mists of uncertainty.
Now we know.
I only wish that there was more meat in the article.
It may be asking too much of the Guardian, but I agree.
I am sure once Holly finds the story from his Mail Online subscription there will be more detail...
It would have helped if it had said more about the 'stones' shot by the Romans - were they covered in tar and flaming or just ordinary...