One of the critical pieces on the philosophy of history was published as Laws and Explanation in History in 1957. Now the hist-analytic site, run by Stephen Bayne, has added the entirety of the book online to its growing list of significant philosophical contributions to the philosophy of history. Links to PDFs below the fold.
Laws and Explanation in History
by William Dray
Causal Laws and Causal Analysis
Explaining Why and Explaining How
