Question: Lo! was the third published nonfiction work of what American writer who specialized in anomalous phenomena?

Context articles: Vector 13
Super-Sargasso Sea
Alexander Imich
Fortean TV
Lo!
Robert Damon Schneck
Charles Fort
The Book of the Damned
William R. Corliss
Fortean Times

Vector 13 is a comic strip published in the British magazine "2000 AD".
 It featured the eponymous agency set up to investigate anomalous phenomena and conspiracy theories.
 It was influenced by American TV drama "The X-Files" (which was at the height of its popularity at the time) and other events like the 1995 release of the alien autopsy film; as the general interest in the paranormal and parapolitics waned, the series was wound up and replaced by "Pulp Sci-Fi" as a venue for single issue self-contained stories.
 In turn it foreshadowed other comics series dedicated to similar agencies, such as Caballistics, Inc. and the Bureau of Paranormal Research and Defense.
The Super-Sargasso Sea is the dimension into which lost things go, whose existence was proposed by Charles Fort, writer and researcher into anomalous phenomena.
 It may be thought of as the spontaneous, anomalous teleportation of an object into another dimension.
 Fort did not actually believe that it existed but, in the vein of the ancient Greek skeptics, he wished only to present a theory that was just as plausible as those in the mainstream.
 The name alludes to the Sargasso Sea of the Atlantic Ocean, which lies next to the Bermuda Triangle.
Alexander Herbert Imich (February 4, 1903 – June 8, 2014) was a Polish Jewish-born American chemist, parapsychologist, and writer, who was the president of the Anomalous Phenomena Research Center in New York City.
 He was born in 1903 in Częstochowa, Poland (then a part of Russian Empire) to a Jewish family.
Fortean TV was a British paranormal documentary television series that originally aired from 29   1997 (1997--) to 06   1998 (1998--) on Channel 4.
 Produced by Rapido TV, the program features anomalous phenomena and the paranormal.
 It was based upon the "Fortean Times" magazine and was presented by Reverend Lionel Fanthorpe.
 "Fortean TV" ran for 3 series (the third was an adult version renamed "Fortean TV Uncut" with unseen material from the previous two series as well as new items).
 The three seasons comprised: 22 half-hour episodes (the last of the first season was a compilation "Best Of"), plus a final hour-long family Christmas special.
Lo!
 was the third published nonfiction work of the author Charles Fort (first edition 1931).
 In it he details a wide range of unusual phenomena.
 In the final chapter of the book he proposes a new cosmology that the earth is stationary in space and surrounded by a solid shell which is (in the book's final words) ".
.
 not unthinkably far away."
Robert Damon Schneck is an American writer specializing in anomalous phenomena and historical oddities.
Charles Hoy Fort (August 6, 1874 – May 3, 1932) was an American writer and researcher who specialized in anomalous phenomena.
 The terms "Fortean" and "Forteana" are sometimes used to characterize various such phenomena.
 Fort's books sold well and are still in print.
 His work continues to inspire admirers, who refer to themselves as "Forteans", and has influenced some aspects of science fiction.
The Book of the Damned was the first published nonfiction work of the author Charles Fort (first edition 1919).
 Concerning various types of anomalous phenomena including UFOs, strange falls of both organic and inorganic materials from the sky, odd weather patterns, the possible existence of creatures generally believed to be mythological, disappearances of people, and many other phenomena, the book is considered to be the first of the specific topic of anomalistics.
William Roger Corliss (August 28, 1926 – July 8, 2011) was an American physicist and writer who was known for his interest in collecting data regarding anomalous phenomena.
 Arthur C. Clarke described him as "Fort's latter-day - and much more scientific - successor."
Fortean Times is a British monthly magazine devoted to the anomalous phenomena popularised by Charles Fort.
 Previously published by John Brown Publishing (from 1991 to 2001) and then I Feel Good Publishing (2001 to 2005), it is now published by Dennis Publishing Ltd.