18 TH HVA U'D UB ON 2B U ED Die 
Number 17070 is a fighter of unusual ability and proclaims 
it in a very loud voice. As soon as the hand is put into the trap 
he starts his challenging, and when the hand gets near he ad- 
vances to attack and springs on the hand, pecking with all his 
might, and never gives up a single instant while in the hand 
being examined, and after release flies to the nearest branch to 
sulk and scold. 
The Whitethroats are acting just the same as last year; 
about a dozen staying around like regular boarders, and we ex- 
pect we will have to feed them until a good storm comes and 
moves them southward. 
The Audubon Bulletin for Fall 1921 contained an article 
on “Securing Life Stories by Bird Banding’’, which described 
how a male Robin that was trapped, banded and released in 1920 
returned to be trapped again in 1921, and how a good looking 
Mother Robin was trapped and banded the same day, as 18030; 
later they were both trapped in a trap Robin Shelter, and proved 
to be a mated pair, and their family was also banded. The story 
ended with our hopes running high in expectation for returns 
in 1922. 
Well, we were pleased of course when the good looking 
Mother Robin 18030 was again trapped in 1922, and we kent 
a constant watch for the Father Robin No. 57617, but we could 
not find him, or just where the Mother had her nest, but later 
the sad reason was discovered by the Park Policeman when he 
found a cat with a Robin, and discovered the band that proved the 
end of Mother Robin 18030. Now our work of proving Robin 
history must begin all over again, but some day we hope to be 
able to tell you if Robins keep the same mates through life. 
Wy. I. LYON 
The Cahokia Mounds 
, A recent bulletin of the Illinois State Museum by A. R. Crook, 
Director, contains a noteworthy discussion of the theories relat- 
ing to the origin of the Cahokia mounds and a summary of the 
most recent conclusions of investigators. Six years ago Profes- 
sor Crook made some studies of Monks’ Mound and was dis- 
posed to regard all of these mounds as of natural origin. More 
recent studies made in collaboration with Dr. M. M. Leighton, 
professor of pleistocene geology at the University of Illinois, 
who favored the theory that the mounds are artificial, have 
brought Professor Crook to support that theory. The discus- 
sion is accompanied by some very interesting photographs of the 
area made by aeroplane photography, the work of Lieutenant 
G. W. Goddard, of the Army Service. The bulletin is a valua- 
ble contribution to the study of primitive man in the Illinois 
area. Copies of this bulletin may be obtained upon application 
to the Illinois State Museum, Springfield, Illinois. 
