In 1913 Charles Brown lived in 62 Gwydir St . C. Brown and Sons (oil and hardware merchants) were next door at 64 and Robert Brown (also oil and hardware merchant) lived at 32 Gwydir St. (See 1913 Spaldings directory for evidence.)

Someone sorting out their loft came across these photos. Click on one for a large version, complete with the writing underneath. One mentions the address 32 Gwydir Street and another 64 Gwydir Street. But while the vans may come from Gwydir Street, the houses are somewhere different.

From an article in the Cambridge Evening News by Mike Petty in 2009, about these photographs.

It was about 1887 that Charles Brown had the idea of supplying groceries and paraffin oil to outlying villages. He believed he could establish a successful business and at the same time provide a service to residents. His son Robert C. Brown joined in, amalgating it with a similar business of his own, and soon many other members of the family were engaged in the paraffin-selling business from their base in Gwydir Street, Cambridge. The early deliveries were made by horse and cart. The family's travelling shops became well-known outside Cambridgeshire and over the Great War spread to 17 counties in Eastern England. Their vans were loaded with saucepans, frying pans, crockery, teapots, soap and brushes and at one time they sold enough matches to stretch from Cambridge to Cairo. But their biggest seller was Somerlite Lamp Oil. To Robert brown, 'Somerlite' was his life blood; he bought oil from various souces of supply, mixed it together and told the public it had no equal. And people seemed to agree: he sold two million gallons a year and was concerned to protect the quality of the product. So when a Fordham retailer started to obtain paraffin from another supplier, he went to sourt to try and prevent it being sold under the name of 'Somerlite'. It was part of this legal process that the photographs of the vans were produced. They show various horse-drawn vehicles including one used at Fordham from January 1919 to Novemeber 1920 clearly proclaiming 'Somerlite Lamp Oil has no equal' and the name 'Robert Charles brown, Wholesale Oil and Hardware Merchant, Gwydir Street, Cambridge.

Today the name is famous since Corgi toys made a model of a Somerlite delivery tanker which is highly sought after by collectors and widely advertised on the internet.