Finest Hour 74, First Quar­ter 1992 (see Churchill Cen­tre web­site), Patrick J.C. Pow­ers: “Savro­la: Churchill’s Pre­mier Lit­er­ary Work”:

The pres­ence in Savrola’s library of Boccaccio’s Decameron, which takes place near Flo­rence, reflects Churchill’s inter­est in the polit­i­cal life of Italy after the col­lapse of Rome. Also, Churchill announced to his moth­er in April 1898 that among his next writ­ing projects would be a biog­ra­phy of Garibal­di, the pop­u­lar 19th cen­tu­ry demo­c­ra­t­ic rev­o­lu­tion­ary. Clear­ly Churchill is pre­oc­cu­pied at this time with the chal­lenge con­front­ed by the pop­u­lar lead­ers Savonaro­la or Garibal­di who, in post-Roman Italy, head­ed demo­c­ra­t­ic efforts to restore and extend the ancient Roman lib­er­ties, and who encoun­tered resis­tance from the demo­c­ra­t­ic pop­u­la­tion they would ben­e­fit and ele­vate.

This sent me to the Offi­cial Biog­ra­phy, Win­ston S. Churchill by Ran­dolph Churchill and Mar­tin Gilbert (Hills­dale Col­lege Press), where there are  index ref­er­ences to Churchill’s pro­posed life of Garibal­di in bio­graph­ic vol­ume 1 and doc­u­ment vol­ume 2. Also, in doc­u­ment vol­ume 3,  his moth­er writes in 1907 “mind you get Trevelyan’s Garibal­di to read en route” (to Africa, I pre­sume).

I also found an index note to Garibal­di in WSC’s fil­ial biog­ra­phy,  Lord Ran­dolph Churchill, where he quotes his father, “Would you undo the Rev­o­lu­tion of Naples because Garibal­di might not be alto­geth­er a man of your mind? You know you would not; you know that those rev­o­lu­tions were jus­ti­fied by atro­cious Gov­ern­ments.”

Check also the index to Win­ston S. Churchill: His Com­plete Speech­es 1897-1963 (8 vols, 1974). In 1944 he speaks of Ciano, Mussolini’s ill-fat­ed for­eign min­is­ter, “on whom the curse of Garibal­di has ver­i­ta­bly fall­en.”