A I' I' E N DICES. 
[The following appendices include such letters and reports as contain matter 
deemed worthy of being preserved and not fully used in the body of the work. Many 
of the reports of agents were received in the form of continued correspondence and 
have heen utilized and ijnoted from in the different chapters. Others again have 
not been of such value as to warrant publication. Some of the replies to Circular 
No. 7 (see Introduction) are added in Appendix VIII. the replies being numbered to 
correspond to the quest ions. The reports as well as the answers to the circular are 
printed just as they were received aud without comment , though it is hardly necessary 
to inform the render who has perused the different chapters that the views and theories 
of the different writers are not necessarily indorsed. They are. rather, published to 
illustrate the conllic t i ng views and theories held by the more intelligent correspond- 
ents. 1 
C3] 
