I just finished reading this book.
Not too long of a read, and sheds some interesting light on the public debates of the late 1800s over the issues of sound money, tariffs, civil service reform, and imperialism.
I find myself in sympathy with the Mugwumps on their political views on these issues, but I find it a somewhat sad book.
The Mugwumps come across to me as men who urged the adoption of Christian morality in public life, but without basing it on the power of a Christian foundation.
Mugwumps: public moralists of the ... - Google Books