Many different newspapers documented the newsboys efforts against the World & the Journal. Two of the most prolific were the Tribune and the Sun.

July 20, 1899:

The Brooklyn Eagle:
“Newsboys Start A Strike”

The Evening Post:
“Newsboys on Strike”
“Strike Days in Wall Street”

The Evening Telegram:
“Newsboys Strike Against Two Papers”

The Sun:
““Newsboys ‘Go Out'”

July 21, 1899:

The Brooklyn Eagle:
“The Newsboys’ Strike”

The Evening Post:
“Newsboys Still on Strike”

The Evening Telegram:
“Newsboys’ Strike Spreads to Harlem”

The Herald:
“Newsboys Strike for Better Terms”

New York Times:
“Newsboys Go On Strike”

New York Tribune:
““Newsboys Go On Strike”

The Sun:
“The Only Tie-Up in Town”

July 22, 1899:

The Evening Post:
“Newsboys Aggressive”

The Evening Telegram:
“Boy Strikers Sweep the City”

The Herald:
“Spread of Strike Fever Among Lads”

New York Times:
“The Strike of the Newsboys”

New York Tribune:
“Newsboys’ Strike Goes On”

The Sun
“Strike That Is A Strike”

July 23, 1899:

The Herald:
“Newsboys’ Strike Promises Success”

New York Times:
“Striking Newsboys are Firm”
“Newsboys May Be Uniformed”

New York Tribune:
“Newsboys’ Word Stands”

The Sun:
“Newsboys’ Strike Swells”

July 24, 1899:

The Brooklyn Eagle:
“Messenger Boys Join the Army of Strikers”
“The Newsboys’ Strike”

The Evening Post:
“Newsboys Want to Parade”

The Evening Telegram:
“Can’t Break Boys’ Tie-Up”

New York Times:
“Mass Meeting of Newsboys”

New York Tribune:
“A Newsboys’ Meeting”

The Sun:
“Plan to Down Newsboys”
“Sociological Students in Court”

July 25, 1899:

The Evening Post:
“Newsboy Strikers Orderly”

The Evening Telegram:
“Newsboy Strike Gains Ground”

The Herald:
“Newsboys Wage A Merry War”

New York Times:
“Newsboys Act and Talk”
“Violent Scenes During Day”

New York Tribune:
“Boys Forsee A Victory”
“Newsboys Riot in Mount Vernon”
“Trenton Newsboys Strike”
“Park Row Capulets and Montagues”

The Sun:
“Great Meet of Newsboys”
“Troy Newsboys In Fight”

July 26, 1899:

The Evening Post:
“Newsboy Leaders Quit”
“Condition of the Newsboys”

The Evening Telegram:
“Newsboys Ready to Show Strength”

The Herald:
“Newsboys’ Strike Becomes General”

New York Times:
“Newsboys Still Hold Out”
“Seek to Help the Newsboys”

New York Tribune:
“‘Newsies’ Standing Fast”
“Yonkers Boys Form A Union”
“New-Haven Newsboys Strike, Too
“Newsboys Striking In Paterson”
“Strikers in Cincinnati”
“Strikers Ahead in Mount Vernon”

The Sun:
“Newsboys Parade To-Night”

July 27, 1899:

The Evening Post:
“Newsboys’ Strike Still Firm”

The Evening Telegram:
“Salvation Lassies Wouldn’t Sell Them”

The Herald:
“Newsdealers and the Boy Strikers”

New York Times:
“Newsboys Are Weakening”

New York Tribune:
“Tried for High Treason”
“Boys Eloquent in Brooklyn”

The Sun:
“Parade To-Night, Sure”
“Newsboys Gain A Point”

July 28, 1899:

The Evening Telegram:
“Newsboys See Victory Ahead”

The Herald:
“Dealers Boycott to Aid Newsboys”

New York Times:
“Newsboys Still Hold Out”

New York Tribune:
“‘Kid’ Blink Arrested”
“Yonkers Boys Win A Victory”
“Providence Boys Join the Strike”

The Sun:
“Newsboys Get New Leaders”
“Stole Newspapers from Girls and Women”

July 29, 1899:

The Herald:
“Newsboy Strikers Keep Up the Fight”

The Evening Post:
“Newsboy Strike Leaders”

The Sun:
“Newsboys’ New Leader”
“A Kindergarten for Strikers”

New York Tribune:
“‘Kid’ Blink Fined”

July 30, 1899:

The Brooklyn Eagle:
“The Newsboys’ Strike”

The Herald:
“Striking Newsboys Stand Firm”

New York Tribune:
“Fable Repeated in Fact”
“New York Newboys (Illustrated Supplement)”

The World:
“Herald Employees Sued for $10,000”

July 31, 1899:

The Evening Post:
“Newsboys Form A Union”

The Evening Telegram:
“Union to Enforce Newsboys’ Strike”

New York Times:
“Newsboys Form A New Union”

New York Tribune:
“Newsboys’ Strike on Again”
“Yonkers Boys to Parade”

The Sun:
“Rochester Newsboys to Go On Strike”
“Striking Newsboys Elect Officers”

August 1, 1899:

New York Times:
“Newsboys Up for Blackmail”
“Declare Newsboys’ Strike a Failure”

New York Tribune:
“Newsboys Plan Another Meeting”
“A Big Parade in Yonkers”
“Newsboys’ Strike in Asbury Park”

The Sun:
“‘World’ Jails Newsboys”

The World:
“Blackmailers Try to Profit by Strike”

August 2, 1899:

New York Tribune:
“Newsboys’ Boycott Over”

The Sun:
“Newsboys Strike Up the State”
“Three Newsboys Arrested for Assault”

August 3, 1899:

The World:
“Plain Statement of Facts for Public Consideration”