Which author is credited with writing the first time travel novel?

H.G. Wells is widely credited with popularizing the concept of time travel using a vehicle in his 1895 novella The Time Machine. While other earlier works touched on time travel through sleep or magic, Wells was the first to introduce a purposeful, scientific machine for this purpose. Other authors listed, like Ray Bradbury and Kurt Vonnegut, wrote much later in the 20th century.