India. (Danish Settlement - French Indo China Postage Dues). 1900. Stamp-less envelope addressed to Thudaumot cancelled by Tranquebar date stamp '9 Fe', routed via Ceylon and Singapore with Colombo 'Feb 6th' and Singapore transits 'Fe 16th', underpaid with circular 'T' hand-stamp and framed 'Postage Due' bearing French General Colonies postage dues Yvert 6, 10c black (right marginal imperf pair) and SG 9, 30c black (imperf with right side margin) tied by Thudaumot arrival 'Feb 21st.
Mail from the former Danish Settlement in Tranquebar with postage dues from French Indo-China a remarkable combination.