CONCLUSION. 807 
It could not be got alive; he received it leafless and branchless; a 
simple dead trunk. It mattered not; the bird, in this hollow trunk 
discovered her accustomed place, and did not fail to make therein 
her nest. She laid eggs, she hatched them, and now her owner has a 
colony of young ones. 
To re-create all the conditions of abode, food, vegetable environ- 
ment, the harmonies of every kind which shall deceive the exile into 
a forgetfulness of his country, is not only a scientific question, but a 
task of ingenious invention. 
To determine the limit of slavery, of freedom, of alliance and 
collaboration with ourselves, proper for each individual creature, is 
one of the gravest subjects which can occupy us. 
A new art is this; nor shall you succeed in it without a moral 
gravity, a refinement, a delicacy of appreciation which as yet are 
scarcely understood, and shall only exist perhaps when Woman under- 
takes those scientific studies from which she has hitherto been excluded. 
This art supposes a tenderness unlimited in justice and wisdom. 
