Sir Edward Grey was first mentioned in Hellboy: Wake the Devil and since then has had a number of relatively minor appearances in various Hellboy comics, sometimes appearing as a cloaked figure wearing a mask. Grey was featured prominently in the first issue of Abe Sapien: The Drowning.
Later that same year, the Witchfinder series made its debut with the short story Murderous Intent in MySpace Dark Horse Presents #16. This short story was designed to introduce Sir Edward Grey in advance of the miniseries In the Service of Angels.
In 2011 a second miniseries, Lost and Gone Forever, was published. A third and final miniseries is planned, but it has been shelved for the present as Mike Mignola is busy with other stories and it is not one that needs to be told just yet.
A full list of Witchfinder stories can be found here: List of Witchfinder stories
Although Witchfinder has been released as a series of miniseries, in addition to numbers within a given miniseries, it also has an ongoing numbering system on the inside cover for the series overall.
- In the Service of Angels #1
- In the Service of Angels #2
- In the Service of Angels #3
- In the Service of Angels #4
- In the Service of Angels #5
- Lost and Gone Forever #1
- Lost and Gone Forever #2
- Lost and Gone Forever #3
- Lost and Gone Forever #4
- Lost and Gone Forever #5
All in-continuity Witchfinder stories are collected into trade paperbacks eventually. So far there has been two volumes. The standard trades usually contain a sketchbook or gallery with an afterword by the author.