Figs. 1, 1a. Typical feathers of hackle and saddle from hen-feathered bird (No. 68) [plate 3], figure 2, that changed over to the cock-feathered bird of [plate 3], figure 3.
Figs. 2, 2a. Typical feathers of an F₁ male (2) that changed over partly as a result of degeneration of his testes, into a cock-feathered bird (2A). The change was not so great as it is after castration.
Figs. 3, 3a. Typical feathers of Sebright male that slightly changed towards cock-feathering (old hackle feather missing).
Figs. 1, 1a. Old (1) and new (1A) wing-coverts of normal Sebright (1) and castrated (1A).
Figs. 2a, 2b. Upper row, to right, “Transitional” hackle feathers (2A), and a slightly later changed-over feather from wing-bow (2A), and from back (2B). Second row, to left, old (2), transitional (2a), and changed-over feather (2b), from saddle of Sebright.
Fig. 3. Three feathers (tail-covert, wing-bow, and saddle) of an F₂ hen-feathered game-like male.
Fig. 4. A series of breast feathers from an F₂ bird. At one end of the series (the left) the feather is spangled, at the other barred.