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In page Mischa Portnoff:

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In 1960, the couple's son Gregory married and, in 1971, moved to Olympia, Washington. Throughout the 1970s, Mischa and Marguerite traveled west to spend summers near their three grandsons. In 1977, the two of them fulfilled a long-time dream by vacationing in Europe. When Gregory remarried in 1978, Mischa and Marguerite visited Canada with the new couple and welcomed three additional grandchildren into their family circle. The pleasure Mischa took in such activities, in friends and in Marguerite is reflected in an excerpt from a letter to Gregory. On Marguerite's recreational eight-hand piano playing in their home, he wrote: "It’s not just the playing, but the company of good friends, and believe me, you hear as much laughter and honest-to-goodness giggles as you hear notes."