Underground city with large skeleton in Missouri

This one comes from Missouri, from around 1895. Here follows the text:

A strange story comes up from Missouri. At Moberly in that state some workmen at the bottom of a coal shaft 360 feet below the surface came upon a buried city arched in by a hard and thick stratum of lava. The streets are regularly laid out and enclosed by walls of stone, which is cut and dressed in a fairly good although rude style of masonry. A hall 30x100 feet was discovered wherein were stone benches and tools of all descriptions for mechanical service. Further search disclosed statues and images made of composition closely resembling bronze but lacking luster. Of course curiosity was aroused to ascertain what kind of people dwelt in this strange city buried for centuries beneath the earth's surface. With a good deal of difficulty in removing debris the workmen finally succeeded in reaching a spot where a stone fountain was found in a wide court or street, and from it a stream of perfectly pure water was flowing, which upon being tested was found to be strongly impregnated with lime. Lying beside the fountain were portions of the skeleton of a human being  and from measurement of the bones it was concluded that when alive the figure was three times the size of an ordinary man and possessed of wonderful muscular power and quickness. The implements found in the city embrace bronze and flint knives, stone and granite hammers, metallic saws of rude workmanship but proved metal, and others of similar character. They are not so highly polished nor so accurately made as those now finished by our best mechanics, but they show skill and an evidence of an advanced civilization.

The searching party spent twelve hours in the depths, and only gave up explorations because of the oil in their lamps being low. These facts are vouched for by the recorder of the city of Moberly and the city marshal, who were of the exploring party. The story, if true, is singular, and if not true is a yarn that would have done credit to Missouri in the palmiest days of her romancing.

Here is some more information about this find.