Revocation of offer 3

Dickinson v Dodds (1876) On Wednesday 10 June 1874 Dodds signed and delivered to Dickinson, a memorandum, which read:  
"I hereby agree to sell to Mr George Dickinson the whole of the dwelling-houses, garden ground, stabling, and outbuildings thereto belonging, situate at Croft, belonging to me, for the sum of £800. As witness my hand this tenth day of June, 1874. £800. (Signed) John Dodds" 
PS -This offer to be left over until Friday, 0900 hrs 12 June 1874. (Signed) J Dodds'   Q Given that the memorandum was an offer was Dodds contractually bound to keep his offer open until 0900 hrs on 12 June? NO  

MyLawOfContract