We stood ready to count the astonishing clatter of reverberations.

We could not say one, two, three, fast enough, but we could dot our notebooks with our pencil points almost rapidly enough to take down a sort of short-hand report of the result.
My page revealed the following account.

I could not keep up, but I did as well as I could.
I set down fifty-two distinct repetitions, and then the echo got the advantage of me.

The doctor set down sixty-four, and thenceforth the echo moved too fast for him, also.

After the separate concussions could no longer be noted, the reverberations dwindled to a wild, long-sustained clatter of sounds such as a watchman's rattle produces.