J H Williamson 1856 to ...
.. little is known of this maker working out of 52 Park Street, Lincoln, Lincolnshire in 1891. This fretless instrument however is very interesting with regard to both the neck clamp; and the make up of the neck which is of four laminations including the main wood, English Yew, which is not known for it's consistent grain.
A C Dawson was teaching banjo out of 2 Castle Street, Lincoln in 1897.
See Hardy for another maker of Lincoln.