Gravelines link all cemetaries, charnel-houses, catacombs, mausoleums, ossuaries, and tombs, and are the primary method by which the Pale travel from place to place. Be they Pale of substance, like ghouls or ghasts, or Pale lacking substance, like ghosts and banshees, all Pale may use the gravelines by their very nature. To the living, they represent a mystery that cannot be plumbed.
Travel is not instantaneous, and the Pale may be tracked or the course of a particular graveline mapped (though they tend to be difficult to follow, proceeding ramrod-straight through bush and earth, rock and house). The most reliable way is to obtain a togdove, a bird only born in a textile fire that claims at least one life. Togdoves by their nature are half of the Pale and are sensitive to the charnel smell and lambent ectoplasmic glow of a graveline. One may provide a trained togdove with a bit of the Pale to be tracked or simply turn it loose and hope that the graveline it follows be the correct one.
The togdove will soar along the graveline as best as it is able, and is often bound by a fine and flameproof chain around one leg. It will signal that the destination has been reached by bursting into sudden flame, which (again due to their nature) is neither painful nor fatal.