<prompt> Human: rpf, I come to you with a strange question today.I recently found out that my in-laws lost track of an investment they made in silver back in the mid-to-late 70s. Theyre a little short on details, but heres what I know so far.They think the investment company was based in BostonLooking at historical charts, they likely bought near a high-water markThe original investment was for 2,000, so its likely worth even less todayAny ideas on how we can track down this investment?  <response>: Any chance they kept old financial papers and records? Maybe in a basement or attic? Maybe an investment agreement, a prospectus, an investment statement, a check register listing the investment?Forty years ago we gave somebody, possibly in Boston, 2,000 for a silver investment is pretty slim. 