On Penalty Envelopes
Official Mail free franked but required to pay the 8c Registration Fee.

DAGUPAN to NEW YORK                                                                       1 APRIL, 1900
War Department penalty envelope from Headquarters, 3th Infantry, USV,
Lingayen, Pangasinan, with violet MIL. STA. DAGUPAN / PHIL. ISLES. postmark.
Backstamped OSWEGO / N.Y. / APR 30.

MANILA to WASHINGTON                                                                    11 JUNE, 1900
From ABEL B. PIERCE, Asst. Paymaster, U.S. N., U.S.S. CONCORD, with 8c total Bureau
issues to pay for Registration Fee only, tied with chevron killers and
purple Mil Sta. No. 1, Philippine Isls, / REGISTERED double circle violet cds
matched with MANILA / R registry control marking. Received WASHINGTON / JUL 22.

CAVITE to WASHINGTON                                                             7 NOVEMBER, 1900
From RAY SPEAR, Asst. Paymaster, U.S. N., U.S.S. IRIS, with 8c total "PHILIPPINES"
issues to pay for Registration Fee only, tied with segmented cork killers and
violet REGISTERED / NOV 7 1900 / Military Sta. No. 2, Cavite / Philippine Islands
registry postmark on the side. Backstamped WASHINGTON / DEC 19 1900.

NAMACPACAN, LA UNION  to MANILA     15 FEBRUARY, 1903
Department of Posts penalty envelope with 1c franking for
Single Domestic Rate. Backstamped SAN FERNANDO / UNION / FEB 18
and MANILA, P.I. / REC'D. / FEB 21.

Starting 1903, Official Mail required to pay postage.