476 APPENDIX. NO. II. 



Blue-dun, is to be found on almost every river ; some 



i>articulars of it have been mentioned in the note. Part 

 I. p. 426 ; but here follow some observations on it, 

 which deserve to be attended to. It varies much in 

 its colour, according to the season of the year: in 

 March and September it is called, and that very pro- 

 perly, the violet dun, for it has often that hue ; and 

 therefore, in the passage above referred to, we have di- 

 rected the mixing blue- violet crewel with the fox-cub 

 down. In April it assumes a pale ash-colour : and in 

 May is of a beautiful lemon-colour, both body and 

 wings. In June and July it is blue-black ; and from 

 July, it insensibly varies till it becomes of its primitive 

 colour, violet dun, which it never fails to do by 

 September. 



APRIL. 



PEARL-COLOUR, or HERON DUN. Dub with the 

 yellowish or ash-coloured herl of a heron ; warp with 

 ash-coloured silk. Wing, from the short feather of 

 a heron or from a coot's wing of an ash-colour. 



Morning and afternoon. 



BLUE DUN. Dub with the fur of a water-rat ; warp 

 with ash-colour. Wing, of a coot's feather. 



Morning and afternoon. 



MAY. 



SILVER-TWIST HACKLE. Dub with the herl of an 

 ostrich feather; warp with dark green, silver-twist, 

 and black cock's hackle over all. 



Taken from nine to eleven, especially in a showery- 

 day. 



SOOTY DUN. Dub with black spaniel's fur, or the 

 herl of an ostrich; warp with green. Wing, the dark 

 part of a land-rail or coot. 



