Railroad and R.P.O. Markings.
30 covers described and mounted on pages in one volume, several early railroad usages incl. "B. &. O. R.R. Brady's Mill" blue oval and unusual Stars in Diamond fancy cancel on 3c 1861 (stained and faulty cover, but rare), "Baltimore R.R." straightline, most are later R.P.O. datestamps, mixed condition (some with serious faults), many are presentable
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