I noted this song carefully on this occasion. Either 
my previous impressions of it have been based on careless 
observation (as I think was the case) or it varies consider¬ 
ably at different times. On each occasion this evening 
it consisted of either two or three sets of twittering notes, 
ecstatic rather than musical and each followed by the usual 
zee- e-e. I should write it thus? — twi-twi-twi-twi- ti- 
zee- e-e, twi-twi-twi-twi- ti- zee- e-e, twi-twi-twi-twi- tj- zee- 
e-e. There were also connecting these repeated phrases one 
or two short stuttering notes so low as to be scarcely audible* 
