There are two simple ways of looking at a packet of information:
The poem “Paul Revere’s Ride” (excerpted) by Henry Wadsworth Longfellow, illustrates both:
LISTEN, my children, and you shall hear
Of the midnight ride of Paul Revere,
On the eighteenth of April, in Seventy-Five;
Hardly a man is now alive
Who remembers that famous day and year.
He said to his friend, “If the British march
By land or sea from the town to-night,
Hang a lantern aloft in the belfry arch
Of the North Church tower, as a signal light, —
One, if by land, and two, if by sea;
And I on the opposite shore will be,
Ready to ride and spread the alarm
Through every Middlesex village and farm,
For the country-folk to be up and to arm.”
[. . .]1
Meanwhile, impatient to mount and ride,
Booted and spurred, with a heavy stride
On the opposite shore walked Paul Revere.
Now he patted his horse’s side,
Now gazed on the landscape far and near,
Then, impetuous, stamped the earth,
And turned and tightened his saddle-girth;
But mostly he watched with eager search
The belfry-tower of the Old North Church,
As it rose above the graves on the hill,
Lonely and spectral and somber and still.
And lo! as he looks, on the belfry’s height
A glimmer, and then a gleam of light!
He springs to the saddle, the bridle he turns,
But lingers and gazes, till full on his sight
A second lamp in the belfry burns! ...