Just wondering why Trevelyan Road 'doesn't fit 'particularly when the Birth cert of another sib gives that address.......
There certainly was a no 153 Trevelyan road in at least later census returns including 1911,( the 1891 has many named not numbered houses, but it was certainly a longish street).
Interestingly in some the handwriting entries the first part of Trevelyan often looks like Frenchie, but the capital letter also looks like the T of Tooting.Looking at an old A to Z not many streets, apart from Franciscan street look long enough for a no 153!
Chris