The Descent of Man

was used. So again, "when we speak of threescore
and ten, we are counting by the vigesimal
system, each score thus ideally made, standing
for 20—for 'one man' as a Mexican or Carib
would put it." (34. 'Royal Institution of Great
Britain,' March 15, 1867. Also, 'Researches into
the Early History of Mankind,' 1865.) According
to a large and increasing school of philologists,
every language bears the marks of its
slow and gradual evolution. So it is with the art
of writing, for letters are rudiments of pictorial
representations. It is hardly possible to read
Mr. M'Lennan's work (35. 'Primitive Marriage,'
1865. See, likewise, an excellent article, evidently
by the same author, in the 'North British
Review,' July 1869. Also, Mr. L.H. Morgan, 'A
Conjectural Solution of the Origin of the Class,
System of Relationship,' in 'Proc. American
Acad. of Sciences,' vol. vii. Feb. 1868. Prof.
Schaaffhausen ('Anthropolog. Review,' Oct.
1869, p. 373) remarks on "the vestiges of human
sacrifices found both in Homer and the Old