Before dealing with it, a few remarks on the general character of the operations that had taken place between March 9th and March 22nd must be made. When reading in succession two narratives of Masséna’s retreat from Santarem to Celorico, one by an English and one by a French eye-witness, it is often difficult to realize that the two writers are describing the same series of operations. Most of the French conceive the retreat to have been a series of triumphant rearguard actions, in which their army got off practically unmolested, under cover of the skilful operations of a small covering force. On the other hand, the English tell the tale as if the whole French army was easily hunted out of Portugal by inferior numbers, foiled in repeated attempts to occupy a permanent position in the valley of the Mondego, and finally thrust back in a direction which it did not intend to take. Where the French tell of nothing but an orderly retreat and small losses, the English speak of the capture of hundreds of prisoners, and the destruction of the whole baggage-train of the retiring army. To a certain extent the mental attitudes of both sets of narrators can be understood and justified by the impartial student. When a rearguard action takes place, the covering force left behind by the retiring army always thinks of itself as being opposed to the whole pursuing host. It considers itself to be braving the assault of immensely superior forces, and if it holds its own for a time and gets off without crushing losses, is well satisfied with its own conduct. This is both justifiable and comprehensible. But to the pursuer the same rearguard action presents an entirely different moral aspect. The few squadrons and battalions forming the head of his advance find themselves suddenly brought to a check by a considerable hostile force arrayed in a formidable position. They are forced to halt till their supports begin to come up, from five, ten, or fifteen miles in the rear. Then, when a body of reserve has begun to accumulate behind them, they launch themselves upon the enemy, who gives ground after more or less fighting and retires. The leading brigade or division of the pursuers considers that it has victoriously driven the whole hostile army from its strong position, and is no less satisfied with itself than is the force to which it has been opposed. In short, all rearguard actions begin with a check to the pursuers; they all end with the retreat of the defenders. This is their necessary course; both parties, if their generals play the game properly, may be content with themselves; the one has gained time for the escape of the main body of the retreating host, the other has cleared the way for the progress of the pursuing army. The only method in which their relative merits can be tested, is by asking whether the rearguard detained the advanced guard as long as might have been expected, inflicted disproportionate losses upon it, and got away