James wrote:


You presumably mean the former Telford Av tram depôt. In 1935, the
following routes were running past Telford Av:
8 Victoria - Vauxhall - Stockwell - (Out via Clapham, Balham, In via
Southcroft Rd, Mitcham La, Streatham, Brixton) - Tooting Bway (reverse
direction see 20)
10 City (Southwark Bridge) - Elephant - Kennington Gate - Brixton -
Streatham - Mitcham La - Southcroft Rd - Tooting Bway
16 Emabankment (In via Kennington Rd, Westminster Bridge, Out via
Blackfriars Bridge, Elephant) - Kennington Gate - Brixton - Streatham
- Norbury - Croydon - Purley
18 Embankment (Anticlockwise version of 16) - Kennington Gate -
Brixton - Streatham - Norbury - Croydon - Purley
20 Victoria - Vauxhall - Stockwell - (Out via Brixton, Streatham,
Mitcham La, Southcroft Rd, In via Balham, Clapham) - Tooting Bway
(reverse direction see 8)
22 Embankment (Clockwise) - Kennington Gate - Brixton - Streatham -
Mitcham La - Southcroft Rd - Tooting Bway
24 Embankment (Anticlockwise) - Kennington Gate - Brixton - Streatham
- Mitcham La - Southcroft Rd - Tooting Bway
N2 (Night Tram) Embankment (Clockwise) - Kennington Gate - Brixton -
Streatham - Mitcham La - Southcroft Rd - Tooting Bway

In addition, the following routes terminated at Streatham Library:
2A Embankment (Clockwise) - Stockwell - Clapham - Balham - Tooting
Bway - Southcroft Rd - Mitcham La - Streatham Library
4A Embankment (Anticlockwise) - Stockwell - Clapham - Balham - Tooting
Bway - Southcroft Rd - Mitcham La - Streatham Library

The reason the tram depot was located by Telford Ave was that this was
the first stretch of the tramway to be motorised in back Victorian
times. Horse-drawn trams would come from central London to the start of
Brixton Hill, where they would be removed and a cable-car locomotive
attached. This would haul the trams over Brixton Hill and Streatham
Hill, and then be replaced with fresh horses for the rest of the journey.