Full Idea
Memory is not solely concerned with the past, let alone one's own past (I remember that I must be in London next week), and need not involve images (2+2=4).
Gist of Idea
I can remember plans about the future, and images aren't essential (2+3=5)
Source
Jonathan Dancy (Intro to Contemporary Epistemology [1985], 12.3)
Book Reference
Dancy,Jonathan: 'Introduction to Contemporary Epistemology' [Blackwell 1985], p.188
A Reaction
I can hardly remember the future, so I presume I am remembering my past commitment to go to London, even if I visualise the future with me in London. The non-necessity of images seems right. I can remember the Mona Lisa without a precise image.