Micah Bradley's Oration

The widow of a Micah Bradley of Portsmouth filed for a War of 1812 pension based upon his service as a captain's clerk on a privateer.

Per in Villonova's Library:

An oration, pronounced July 5th, 1813, at the request of the Republicans of the town of Portsmouth, in commemoration of the anniversary of American independence. Main Author: Bradley, Micah, 1781-1815.  [See copy]  

History Of The Fourth Regiment

Harrison At Tippecanoe

A history of the organization and movements of the 4th regiment of Infantry, U.S.A., 1796-1870.

"...the Regiment is reported to have been raised in and about the States of New Hampshire, Vermont, and Massachusetts, and is supposed to have been employed during the years 1808-'09-'10 in protecting the frontiersmen in the territories north of the Ohio river and south of the Great Lakes, as the first official notice taken of the Regiment is during the campaign of General Harrison against the Indians in the northwest.

I Will Try

Source - Norwich University

The Norwich University and their motto explained:

It was thought for generations..."that the words, 'I will try' were first uttered in 1847 by Colonel Truman B. Ransom in the heat of battle during the Mexican War."

The answer...to the...question, "who did coin the University motto, and when?" can be found in the first volume of Ellis' History of Norwich University (1912). [which stated that] the origins of the words "I will try" can be traced to the War of 1812.

They were uttered by Colonel James Miller of New Hampshire.

Source

Colonel Joseph Cilley

Memoirs and services of three generations...Cilley:

Joseph Cilley, at his election to the Senate, was an old man. Not only broken and shattered by the contests of three-score years and ten, but by the strife of his country s battlefields, in which he had borne gallant part. He was with Scott and Miller in all the bloody conflicts of the Canadian border in the war of 1812; and from those fields he had come with but one eye left, and his body weighted with the leaden bullets of his country's enemy.

There's more biographical information about Joseph Cilley here.

From Fold3:

Seat Of War Map

From John Hopkins University (Sheridan Libraries):

Source

The Library of Congress calls this "A correct map of the seat of war."

Captain Weeks' Company Payroll

From A List Of Pensioners Of The War Of 1812:

PAYROLL OF A COMPANY OF INFANTRY COMMANDED BY CAPTAIN JOHN W. WEEKS, OF THE ELEVENTH REGIMENT OF THE UNITED STATES, FOR THE MONTHS OF JANUARY AND FEBRUARY, 1813

Two items of interest:

Henry Alden, private, deserted from the Fourth Regiment April 23, 1809, and delivered himself to Lieutenant Green, Dec. 26, 1812

And

Job Barnet, private, died Jan. 12, 1813

Lewis Cass, Military Governor

Source

Lewis Cass was born at Exeter, New Hampshire, October 9, 1783.  Was appointed military governor of the territory of Michigan, October 14, 1813, and the following year made permanent governor, with William Woodbridge as secretary.  The war of 1812-15 had but closed, the population had been scattered and was still exposed to the ravages of the hostile Indians.  A brave, sagacious and firm had was therefore needed to restore order and confidence, as well as to rebuke outrages perpetrated by the English authorities in Canada under the plea that they had a right to invade the territory in search of and arrest deserters from their army. [Source]

See the biography of Lewis Cass here.

Wikipedia has places named after Lewis Cass.

General Henry Dearborn

 Henry Dearborn (1751-1829), who was born in New Hampshire, also fought in the Revolutionary War*.  

*Dearborn volunteered for service in Benedict Arnold's expedition to Quebec. In the battle, in which Montgomery was killed and Arnold seriously wounded, Dearborn was taken prisoner and confined for a time at Quebec. [Source]  It was thought that General Dearborn was past his prime in the War of 1812.

Portrait Source  

A guide to Henry Dearborn's papers found here, including:

Dearborn Historical Commission
Dearborn, MI
Papers and Microfilm: 1761-1826, 2 feet and 92 microfilm reels.
The collection covers Henry Dearborn’s career as officer in the American Revolution and the War of 1812, as secretary of war (1801-1809), collector of the Port of Boston (1809-1812), and minister to Portugal (1822-1824). 

James Miller

General James Miller (1776 - 1851), a native of New Hampshire, was a Commandant at Fort Harrison, in October and November of  1811.  He was known as the Hero of Lundy's Lane.  He was also a prisoner of war (exchanged in 1813) for Lord Dacres.

In 1819 he was appointed as the first governor of the Arkansas Territory (his bio there indicated that he received a commission as a major in the Fourth United States Infantry in 1808. In command of the Twenty-first United States Infantry by the time of the War of 1812, Miller distinguished himself at the Battle of Lundy’s Lane, where he was known to have said “I will try sir!”...).

Mr. Miller's portrait was found in Makers of Arkansas History...

"But it is with Nathaniel Hawthorne and General James Miller the hero of Lundy's Lane that the present Custom House is chiefly associated. General Miller was Collector of the Port from 1835 to 1849 and in 1846 Hawthorne was appointed Surveyor of Customs by the new Democratic administration.... ." [Source]

On a genealogical note:

Genealogy of the Descendants of John White of Wenham and Lancaster ..., Volume 3, mentioned General James Miller's mother:

...Martha R. Wilder occupies the home farm, and has in her possession a teakettle which her great grandmother brought on horseback from Boston, Mass.; she [the great grandmother] was the mother of Gen. James Miller, who was the hero of Lundy's Lane in the War of 1812....

James Miller was born in Peterborough, New Hampshire, on April 25, 1776, to James Miller and Catharine Gregg Miller. He married Martha Ferguson, with whom he had one son, James Ferguson Miller, a noted naval officer. After Martha’s death, he married Ruth Flint.

Portrait Of General Lewis Cass

A portrait of Lewis Cass from a book by Major John Richardson, Richardson's War of 1812:

Not My Elijah Richmond

Excerpt from the Joshua Bailey Richmond "Richmond Family" book.

"He marched to the scene of conflict at Plattsburgh in the War of 1812, leaving his family hurriedly in the night."

Married Ruth Crain in 1803, in Bethel, Vermont.

This is my Elijah Richmond.  This one is not.