Answer:
A man calls his dog from the opposite side of the river. The dog crosses the river without getting wet, and without using a bridge or boat. How?
What travels from house to house and is sometimes narrow and sometimes wide but always stays outside?
Salty water everywhere but not sea in sight.
What has six faces and twenty-one eyes?
What can be heard and caught but never seen?
I fly to any foreign parts assisted by my spreading wings. My body holds an hundred hearts Nay I will tell you stranger things when I am not in haste I ride and then I mend my pace anon.