I'd temporarily forgotten she knew our whereabouts in Keene from my neglect in using an unsecured phone. [Please select]
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'A sudden recollection--important papers unsecured at my hotel--business in--in Lincoln's Inn Fields.' [Please select]
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It was his fault, his very grievous and careless fault for having postponed the destruction of the papers, and for having left them loose and unsecured in his rooms. [Please select]
Do you have a better example in your mind? Please submit your sentence!