Jared Nye, on Drew's left, took off his hat and waved a wide-armed signal to answer Greyfeather's mirror.
Jared only had a single arm but, he could wave it mightily. 
mnli hypothesis: Jared only had a single arm but, he could wave it mightily.  premise: Jared Nye, on Drew's left, took off his hat and waved a wide-armed signal to answer Greyfeather's mirror.