The first is the plot sequence that includes Tristram's conception, birth, christening, and accidental circumcision. (This sequence extends somewhat further in Tristram's treatment of his "breeching," the problem of his education, and his first and second tours of France, but these events are handled less extensively and are not as central to the text.) It takes six volumes to cover this chain of events, although comparatively few pages are spent in actually advancing such a simple plot. The story occurs as a series of accidents, all of which seem calculated to confound Walter Shandy's hopes and expectations for his son. The manner of his conception is the first disaster, followed by the flattening of his nose at birth, a misunderstanding in which he is given the wrong name, and an accidental run-in with a falling window-sash. The catastrophes that befall Tristram are actually relatively trivial; only in the context of Walter Shandy's eccentric, pseudo-scientific theories do they become calamities.