Perhaps Gillespie's Wholesome Severity Reconciled with Christian Liberty would provide some use for you on this topic?

__________________
Rev. Todd Ruddell
Pastor, Christ Covenant Reformed Presbyterian Church (RPCGA)
Wylie, TX
www.christcovenantreformedpc.org

Our best marks can contribute nothing to our justification, ...that is proper to faith. Faith cannot lodge in the soul alone, and without other graces; yet faith alone justifies before God.--G. Gillespie