Assertion: headless horseman | /r/CapableOf | publish as book
Facets:
value: in 1866
type: TEMPORAL
value: subsequently
type: TEMPORAL
Source sentences:
text: The Headless Horseman is also a novel by Mayne Reid, first published in monthly serialized form during 1865 and 1866, and subsequently published as a book in 1866, based on the author's adventures in the United States.