Wikipedia:
The Youth's Companion (1827–1929), known in later years as simply The Companion—For All the Family, was an American children's magazine that existed for over one hundred years until it finally merged with The American Boy in 1929. The Companion was published in Boston, Massachusetts by the Perry Mason Company (later renamed "Perry Mason & Co." after the founder died). From 1892 to 1915 it was based in the Youth's Companion Building, which is now on the National Register of Historic Places.
Back Issues at Archive.org:
March 8, 1888, Vol. 61, No. 10
November 1906 Thanksgiving Number, Vol. 80, No. 48
Youth's Companion Project Blog (offers scans of several issues)
Cover Art at MagazineArt.org
