Hi Jo
I checked Colebrooke Row on the 1891 Census. Found one in Islington, not Clerkenwell
and only number 41. :
1891 Census
0167 / 34a page 11
41 Colebrooke Row, Islington
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Mary A Leaver? Head Widow 60 Living on own means born London Clerkenwell
B.M.A. Adamson Daur S 29 Drapers Assistant London Islington
G.R. Leaver Daur S 27 Milliners Assistant / Dress "
M.L. or T? Leaver Daur S 25 do------------------------ "
Joaquin? M Leaver Son S 19 Stock? Jobbers Clerk "
Reginald R Adamson Grdson S 7 Scholar "
Thomas Beard Boarder S 32 Stationers Traveller Yorks Bradford
Maria Davey Serv S 40 General Servant London Islington
William E Madself? Lodger S 24 Ironmongers? Labourer London Pimlico.
Goes up to 75 Colesbrooke Row.
Says on 1891 index that Colebrook 'Terrace' now includes part of Duncan Terrace.
Realise its Terrace and not Row but checked Duncan Terrace anyway but found no 111.
1891 Census 0228 / 43a p11
8 Chadwell Street, Clerkenwell
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Surname looks like Cunfield..
George E Head Wiwdr 54 Seasonal??? box maker Lambeth
Mary A Daughter 25 jewel box engraver lealh? Clerkenwell
Charles E Son 20 Clerk ..
Alice E Sister 40 Housekeepers dom Lambeth.
Good luck
Reyz

Addition:
Jorose posted before I read their reply and it looks like on the right track..
Just to add :
1891 - The Midwife is not at no 11 or elsewhere in Colebrooke Row, that I can see.