Ind Coys reference. What were Blazons?

[neloon]

What the dictionaries say:-

Dictionary of the Older Scottish Tongue
Blason , n. Also: blasoune, -owne, -ane; blassoun, -one; blaisson.[ME. blasoun (c 1325), blason, OF. blason.] A shield or breastplate bearing a charge or coat of arms; the charge or coat of arms itself; a badge of office of this nature.

Oxford English Dictionary
s.v. blazon n.
Sc. Law. The badge of office worn by a king's messenger on his arm.

Alan