(http://img593.imageshack.us/img593/9271/amillsflies2.jpg) (http://imageshack.us/photo/my-images/593/amillsflies2.jpg/)
This photo was kindly donated by Steve Williams, taken of flies from William Mills and Sons, in his possession. He puts the date around 1940, but I think they may be earlier than that.
I have digitally enhanced these images from scans of catalogues in my possession. MC
(http://img90.imageshack.us/img90/5153/millsstream247.jpg) (http://imageshack.us/photo/my-images/90/millsstream247.jpg/)
(http://img829.imageshack.us/img829/9330/ast4.jpg) (http://imageshack.us/photo/my-images/829/ast4.jpg/)
(http://img69.imageshack.us/img69/1583/ast5.jpg) (http://imageshack.us/photo/my-images/69/ast5.jpg/)
(http://img842.imageshack.us/img842/691/ast6k.jpg) (http://imageshack.us/photo/my-images/842/ast6k.jpg/)
(http://img855.imageshack.us/img855/563/ast10.jpg) (http://imageshack.us/photo/my-images/855/ast10.jpg/)
(http://img810.imageshack.us/img810/4343/ast7.jpg) (http://imageshack.us/photo/my-images/810/ast7.jpg/)
(http://img705.imageshack.us/img705/4990/ast8.jpg) (http://imageshack.us/photo/my-images/705/ast8.jpg/)
(http://img716.imageshack.us/img716/7964/ast9.jpg) (http://imageshack.us/photo/my-images/716/ast9.jpg/)
(http://img855.imageshack.us/img855/563/ast10.jpg) (http://imageshack.us/photo/my-images/855/ast10.jpg/)