How slow the Wind — Dull-Writer

How slow the Wind-1
how slow the sea-
how late their Feathers be!
(F.1607/J.1571)
[1] the Wind: those who speak to the wind, write futilely with their feather pens. As a thing devoid of sense or perception, or that is unaffected by what one does to it (OED 6)". slow: dull.
[2] the sea: a great number of people with their feather pens, writers. slow: sluggish.
[3] late: old-fashioned. Feathers: feather pens.