Sentence:  Now Hans had given Ma something of his - we both had when we thought she was going straight to Pa - something valuable ; but since she did n't <WSD>know</WSD> we 'd given it to her , there was no easy way of getting it back . 
Meaning of the word marked with <WSD> tags:  be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about