Side Letter: What families want from direct PE; a16z’s retail bet; Altas plays long game

In light of Monday's state funeral for Queen Elizabeth II, there will be no Side Letter until Tuesday. Multi-family office Stonehage Fleming launches deal platform. Plus: Venture giant a16z is betting on massive retail demand for alternatives; and long-hold specialist Altas is aggressively bolstering its ranks. Here's today's brief, for our valued subscribers only.