let me see
Also, let's see. I'm thinking about it or trying to remember, as in Let me see, I'll be in Boston tomorrow and the next day. This idiom was first recorded in 1520.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.