Fugitive Slave Act of 1850 | ''The Fugitive'' | Little Fugitive | Cadmium pigments | ''Fugitive Slaves in the Dismal Swamp, Virginia'', by David Edward Cronin | Fugitive slave laws | Fugitive Slave Act of 1793 | Face of a Fugitive | A Fugitive from the Past | 226th fugitive to the FBI's Ten Most Wanted list |
The colours were used because the authorities were concerned that the existing stamps were being soaked off envelopes and reused, and they wished to use fugitive inks that would wash away if immersed in water; the only fugitive ink colours available at the time were lilac and green.