1
general::
Phrase(s): piece something together
to fit something together; to assemble the pieces of something, such as a puzzle or something puzzling, and make sense of it. • The police were unable to piece the story together. • The detective tried to piece together the events leading up to the crime.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Join or combine parts into a whole, as in With information from several observers, she pieced together an account of what had actually taken place. [Late 1500s]
American Heritage Idioms