Perhaps New Yorkers will gather some day soon at the allegorical statue of “Memory,” in the park named for Isador and Ida Straus. They founded Macy’s and saw great triumphs, but he went down on the Titanic, and Ida chose to stay with him. No less a muse than Audrey Munson posed for “Memory.” Now the husband of their great-great granddaughter just perished on the Titan, which foundered in the same depths.