Hi Waldo,
Think this may be him, with surname Manly so possibly illegitimate and living with Nichols grandmother and uncles and aunt (or possibly mother) Jane. Family indexed on ancestry as Nickols. No relationships shown in 1841 but as the uncle David that George was living with in 1851 was a bricklayer it could possibly be the right family, hope so:
1841 HO107/1349/10 fol.15 p.23 Well Street, Leeds
Mary Nichols 50
Jane " 20
David " 20 Bricklayer App.
Wm. " 15 " "
George Manly 3
all born in Yorkshire
Barbara