THE LIFE OF BERTRAND RUSSELL
by RONALD W. CLARK 766 pages. Knopf. $17.50.
MY FATHER, BERTRAND RUSSELL
by KATHARINE TAIT 211 pages. Harcourt Brace Jovanovich.
THE TAMARISK TREE
by DORA RUSSELL 304 pages. Putnam. $9.95.
The mathematician-philosopher Bertrand Russell was a child's delight, full of games and good spirits and tall tales. As the Pied Piper of Cairn Voel, his country retreat on the Cornwall coast, he used to lead his young followers on hunts for the ingredients of a special home brewa concoction of stagnant water, mold, dead leaves, old grass and whatever other unsavories could be dredged up at the moment.
The slop, labeled "Poison for...