I don't have any panels showing Alfred's childhood at hand (Hey DC! Do a Teen Alfred comic book, huh? It'll sell a million copies!), so here's a retelling of his very first pre-Crisis appearance to a bewildered and baffled Bruce Wayne and Dick Grayson. Let's call it "Alfred: WHo He IS and How He Came to be (At Wayne Manor!)":
Page from Untold Legend of the Batman #2 (August 1980), script by Len Wein,
pencils and inks by Jim Aparo, colors by Tatjana Wood
Happy Birthday, Alfred!