THE. ROLLER ‘CANARY 4l 
in their studies. One day he hears the hollow roll, queen 
of tours, the tour that gives the song its intrinsic value, 
and without which there can be no talk of good song. 
The tour we hear first, therefore, is this, the finest. 
At first it is short, then quick, and gradually 
lengthening out, of medium pitch, rising and falling 
soft and clear ; very soon afterwards we hear the first 
beats of the deep Hollow Roll (rrrou). When the 
“hollow,” as we call it, comes out well in this stage, 
the breeder knows he has won his object ; “ hollow ” 
songsters are ever sought after. Only one care now 
remains, namely, as to whether he is going to discover 
a good strong Knorre (Bass), but he must wait patiently, 
for although Bass is not the latest arrival, yet it does 
not make its appearance in the young birds until 
September. 
HOLLOW BELL AND HOLLOW ROLL 
After Hollow Roll we very quickly get Hollow Bell, 
which also rises and falls on the same pitch with the 
same vowel sounds, but, of course, without the roll of 
the rer.” + Deep. Hollow’ Bell. “ou, ou, ou,” is com- 
monly, but incorrectly, marked Schockel, which tour we 
shall describe later. 
Very soon we shall hear Bell Roll with a clear roll 
on ‘“‘rrree,”’ and a nice short soft bell ‘‘ Illee,’’ also tender 
flute notes, “tee, tee, tee,” and the deeper “‘ dou, dou, 
dou.” These flutes are an ornament to the song, and 
heighten the value of the bird. To the well-attuned 
ear of the musical breeder there is no greater delight 
than listening to a number of good birds with a pure 
song heightened by deep tender flute notes which shine 
