"Attleboro Branch RR" electrification?

I know that this used to be a steam road from Attleboro MA on the "Boston & Providence" to a dead-end terminal at North Attleboro, and understand that the "Old Colony" leased it and continued it northwards as the "Wrentham Branch".

Then the NH built a link from North Attleboro to Valley Falls RI, and the original branch was electrified as a trolley line.

Can anyone tell me which trolley subsidiary of the NH ran it? Was it the "Interstate Consolidated"?

The reason I ask is that an electric railway nut I know thinks there may have been two NH trolley lines between Attleboro and North Attleboro, this being one of them, but I'm sure he's wrong.

There was also a street line, the Attleboro North Attleboro & Wrentham St. Ry. It was later consolidated with the Interstate St. Ry. under the control of the New England Investment and Security Company which was the New Haven RR subsidiary which also owned the Attleboro Branch RR. and so much more. Both routes lasted into the 20s and suffered the usual fate.
I dont think the Attleboro Branch RR even reverted to steam freight.
LS