Wikipedia
Wondermark is a webcomic created by David Malki which was syndicated to Flak Magazine and appeared in The Onion's print edition through 2008. It features 19th-century illustrations that have been recontextualized to create humorous juxtapositions. It takes the horizontal four-panel shape of a newspaper strip, although the number of panels varies from one to six or more. It is updated on a strict twice-weekly schedule.
A typical Wondermark episode consists of one or more Victorian-era drawings of people and/or objects, repeated for several panels, with dialogue added to create a joke. In some cases, the images vary from panel to panel, creating a narrative. Occasionally, the joke in the last panel takes the form of a purely visual gag.
The creator, David Malki, has stated that the images are obtained from public domain primary sources such as 19th century-era periodicals. Malki obtains these images from public libraries and from his own collection of rare books.