For anyone who missed out on the debates of Pakicetus and Ambulocetus, go to:
--- --- --- --- --- --- --- --- ---
Sherwin claims that Colbert's book was published in 2001. It seems that he is off by only a half century from the original publishing date.
"Colbert, E. H., 1955, Evolution of the Vertebrates [1st ed.]: New York, Wiley and Sons, Inc."
That would explain why the book seems blithely unaware of the whale transitionals found in the last several decades.
I am sure that you went back to the original source to ensure that Sherwin was quoting the right edition.