Thanks to Harry Fountain, a lover of local history, for the following.
When Swineshead Abbey (5 miles from Boston) was in its palmy days the Abbot is said to have been "rowed in his barge to the ford at the entrance to Boston, where the Abbey owned a house and garden near the mill." This street became Ford End Lane, then Forthe End Lane, Farthing Lane, Fir Dale Lane and ultimately West Street as it is still known today.
Carlton Road was an old road formerly known as Butt Lane. Towards the close of the 15th century King Edward IV issued an order that archery butts should be provided on the borders of each township. The Boston butts were situated on the west bank of the river, Butt Lane leading to them. The butts on the east side of town were situated near Bargate Bridge on the town side of the stream known as the Scyre Beck, now the Maud Foster Drain.
George Street, King Street, Queen Street and Innocent Street (top of King Street) are said to have been named as a result of the trial of Queen Caroline, the wife of George IV, who was tried for adultery and found to be innocent.
Liquorpond Street was once called Walnut Tree Pastures, a road called Water Lane connected it with High Street (once called Gowt Street} via what is now Victoria Place.