English: A heraldic whirlpool or gurges shown on a shield. This is a version of one coat of arms of the Gorges family of England. Sir Maurice Russell (2 February 1356 – 27 June 1416), a High Sheriff of Gloucestershire, was descended from this family.
The Archimedean spiral was generated from the following vector PostScript source code:
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300 396 translate -.42 .42 scale/pi 3.1415926535898 def/R 180 pi
div def/W 15 def/U 7.01 def/D 180 def/C 54 pi div def/L{/Y 0 def
0 W U 360 mul{7{dup}repeat D add cos/H exch def D add sin/G exch
def H mul R div/Q exch def G mul R div/E exch def Q C mul/x exch
def E C mul/y exch def/S G Q add H E sub div def G 0 gt G 0 eq H
-1 eq and or{/F -1 def}{/F 1 def}ifelse/A exch def A 49.294 lt A
180 gt A 196.274 lt and or{/F F neg def}if W sub dup dup dup D
add cos C mul mul R div/M exch def D add sin C mul mul R div/N
exch def W add dup dup dup D add cos C mul mul R div/O exch def D
add sin C mul mul R div/V exch def/P x M sub dup mul y N sub dup
mul add sqrt pi div def/Z x O sub dup mul y V sub dup mul add
sqrt pi div def/B S S mul 1 add sqrt def 0 eq{0 0 moveto/X D cos
Z mul def}{X Y x 1 F mul B div P mul sub y S F mul B div P mul
sub x y curveto /X x 1 F mul B div Z mul add def/Y y S F mul B
div Z mul add def}ifelse}for stroke}def L/U 6.51 def/D 0 def L
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A heraldic whirlpool or ''gurges'' shown on a shield. This is a version of one coat of arms of the Gorges family of England. Self-made image which is a vector equivalent of en:File:GorgesArmsMediaevalShield.jpg . The Archimedean spiral was generat