All three children - Lydia HOLLOWAY, George HOLLOWAY and Sarah Holloway COOK - were baptised at Kings Langley on 27 Nov 1820, children of Eleanor COOK, with no mention of father.
Based on the auction article, they must have collectively decided to sell up the estate (of their father George Holloway) in Two Waters immediately, and hence all three children, now fairly well off, were able to decamp to Amersham in 1827.