In the dining room of Harriet Prescott Spofford's house at Newburyport is one of these stoves, before which Whittier delighted to sit during his frequent visits to this old home. It is a fine specimen of its kind, and as interesting in its way as the quaint room which it graces. For many years this dwelling served as an inn, kept by one Ebenezer Pearson, being one of the favorite resorts for pleasure parties, and in the old-time dining room much brilliant parrying of wit took place, as distinguished visitors amiably chatted over their teacups. Later in the eighteenth century, another form of heating came into vogue. This was the fire frame, which appeared about thirty years after the invention of the Franklin stove, and in type was something of a compromise between the open fireplace and the stove, possessing certain characteristics of each. It was so arranged that it could be used in a fireplace that had either been filled in with brick, or finished with a fireboard, and in appearance was very similar to the upper part of a Franklin stove. Unlike the stove, however, it rested directly upon the fireplace hearth, instead of being raised from the floor. When coal first came into use, a Salem man saw it burn, and so impressed was he with its worth that he told Dr. George Perkins of Lynde Street about it. The doctor immediately ordered a barrel of the fuel to be brought down in a baggage wagon from Boston, and he also ordered a new-fangled stove of the hob grate order. The trial took place in the living-room of his home, and the neighbors gathered to watch it burn. So great was the success of the venture that a load of coal was ordered, and it landed at the North River wharf, where the water was then so deep that vessels could easily come to pier there. The cargo consisted of from one hundred and sixty to one hundred and seventy tons, considered an enormous load at the time. The first coal burned in a stove was in Wilkes-barre, Pennsylvania, where Judge Jesse Fell, in the main room of the old tavern, in February, 1808, started the first coal fire. Previous to that time coal had been burned in open forges, under a heavy draught, by a few blacksmiths, but it had never been adapted for household purposes, and the discovery that it could be used changed it from a useless thing to something of great value. In 1812 Colonel George Shoemaker discovered coal in the Susquehanna Valley, and he took twelve tons of it to Philadelphia to sell. He disposed of two tons, but was compelled to give the rest away, as people considered him a fraud, proving that the use of coal was not general at this period. The hob grate came into use in 1750, a few years after the advent of the Franklin stove, and it proved especially valuable for the burning of coal, when that product became popular. At first it was known as "Cat Stone," but later was called hob grate, by which name it is known at the present time.