Our long time member Tirademan (R.I.P. Scott McClean) compiled this extensive archive of Sasquatch related newspaper articles and donated it to the BFF before his passing. The earliest articles in this collection are from 1818 in Florida, 1877 (Australia), 1884 (Canada) and 1764 (Europe).
Yes, coyotes can do a single bark. Dogs can do a single bark. Humans can do a single bark. Seals can do a single bark. I suspect other animals can do a single bark. But importantly here Sasquatch can do a single bark - and my experience is that they frequently do - a single sharp bark only loud enough to catch the target human's attention.