Dutch tugs Vlinder and Piet Hein sold at Rotterdam, Netherlands according to the Dutch newspaper Rotterdamsch Nieuwsblad dated 29 July 1899

An advertisement reported that on a public auction on Tuesday 1 August 1899 14.30 o’clock in Pro Patria, Scheepmakershaven 29 at Rotterdam were to be sold the tugs Vlinder with a15hp engine, high pressure 5 atmosphere and 24 square metres heating surface, built in 1855 and the tug Piet Hein with 10 hp, 5,16 atmosphere and 17 square metres heating surface.