"It [the viola] is worthy in every respect of its surviving companions of the quintet -- the violin and violoncello; wood and varnish are identical with those used for them, although the viola seems a shade lighter in color than the violin."
Antonio Stradivarius: His Life & Work, W. Henry, Arthur F. & Alfred E. Hill, W. Henry, Arthur F. & Alfred E. Hill, Antonio Stradivari: His Life & Work (1644-1737), London
"In 1977 the library received on indefinite loan the 'Tuscan-Medici' Stradivari viola, the property of the Tuscan Foundation."
National Treasure, Philip J. Kass, The Strad, November, 2006, London
"The instrument has six-filled holes in the ribs below the saddle. These holes indicate that either the viola was at one time strung with more than four strings or that a unique type of tailpiece may have been attached to the bottom block at these points. . . ."
On the inside of the top in the treble upper bout, written in pen, is the inscription: 'The Medici Stradivari / AH June 1913.' This corresponds with the Hills acquiring the viola from Mr. Avery Tyrell in 1913, the 'AH' standing for Alfred Hill."
Tuscan-Medici Stradivari; Library of Congress