On the east side of the 400 block south of Main Street, Baptists built a stone church in 1867, and a tabernacle tent stood there for a Kansas Baptist Convention in 1869; by the 1890s the church had been moved to the northeast side of the block, while the corner lots became the site of John Halloran's lumber yard. That yard was eventually replaced by the Professional Building, which still stands and at one time housed a car dealership on the second floor, where test drives required navigating a steep ramp to the ground floor and a sharp exit across the sidewalk onto Main Street; later, Pence & Bales IGA occupied the ground floor. The corner marked the southern reach of the 1951 floodwaters, though water also rose along Skunk Run in City Park one block south, and at that time the second floor was being used by a women's clothing factory called Mode O'Day. In November 1899, George Washburn's family posed there with their Flower Parade float welcoming the 20th Kansas unit home from the Philippines, with his wife Alice, daughter Hazel, and another girl in the carriage; behind them stood Solomon Hester's Hotel de Hoss and George Washburn's architectural office. Hotel de Hoss, a livery stable, was an early Ottawa business where people could rent horses and buggies or board their own horses. Later in the block, A.C. Carpenter's Lesh Oil station reflected the twentieth-century rise of gasoline stations, offering a sunken grease pit for lubrication, antifreeze from a pump, and a landscaped stone-and-wood building; one of its pumps, manufactured by Ottawa Manufacturing from recycled oil field pipe, has been restored and is now at the Old Depot Museum.