Davis joined Lanza for a concert at Quebec's Palais Montcalm on October 10, 1947, accompanied by pianist Josef Blatt. This concert was notable for being possibly the only occasion on which Lanza performed the Act I duet from Puccini's Tosca, apart from an abridged live radio performance in 1945.

Lanza was a member of the chorus at the time, and participated in some 200 performances of the musical play.

A high school dropout, de Paur later studied music at Columbia University and the Institute of Musical Arts (now Julliard School of Music) under the mentorship of Hall Johnson, noted African American composer. As musical director of the Negro Unit of the Federal Theater Project during the Depression, de Paur was instrumental in expanding racial integration in the performing arts. Speaking of his time with the Federal Theatre Project, de Paur stated, "What years they were...A whole manner of things never attempted before in theater bloomed there!"

Critically acclaimed as a choral conductor, composer and arranger, de Paur also created works and conducted orchestral and operatic productions after World War II as well as projects on Broadway and on television. During the 1960s, his de Paur chorus toured globally, including numerous concerts in Africa under the auspices of the US Department of State. "Music was the oxygen in which I existed," he told an interviewer. [Obituary for De Paur here.]

He later founded the Ottawa Philharmonic Orchestra, with which he conducted Lanza at a very well-received concert on November 13, 1946. ("[The audience] screamed and stamped and cheered," wrote the concert's promoter the following day. "It was impossible for him to leave. He was even forced to repeat one of his encores.") Dr. De Ridder was subsequently quoted as saying that he had never worked with a more "wonderful" soloist than Lanza. [Link here.] Reviewing their concert the following day in the Ottawa Citizen, Lawrence Thistle singled out the tenor's rare "golden quality," melodiousness, "purity of tone," range and vocal power.

It was on Agnini's advice that Lanza studied the role of Pinkerton with Leila Edwards for the New Orleans Opera Association's 1948 production of Puccini's Madama Butterfly. Edwards worked for four months with Lanza, and recalled years later that the tenor possessed an “instinctive” ear for phrasing that made him a quick study, a “magnificent” voice of “limitless power,” and that he had been a “perfect gentleman” with whom she never encountered any problems. “I didn't travel to New Orleans to hear him in Butterfly,” she added, “because I thought it was only a matter of time before I'd see him at the Met.”

Ferrara was much admired by Herbert Von Karajan, who freely acknowledged that his own rise to the top of his profession was made easier by Ferrara's early retirement. (Ferrara did, however, continue to conduct in the recording studio.) Among his pupils were renowned conductors Riccardo Chailly and Riccardo Muti. In December 1958, Ferrara worked with Lanza, conducting what is generally regarded as the tenor's finest studio album, a collection of Neapolitan songs released as Mario! (and as Canzoni Napoletane in Italy). Nearly twenty years later, Ferrara recalled that Lanza had been “vocally extraordinary with a voice that had both steel and warmth”— “a Caruso-type voice”—and that “he possessed a great musicality.”

and for a staging of the third act of Puccini's La Bohème at the Berkshire Music Festival in Tanglewood in 1942. Lanza later recalled that Foss was one of several “strict taskmasters” with whom he worked at Tanglewood.

of Nicolai's comic-fantastic opera The Merry Wives of Windsor at the Berkshire Music Festival in Tanglewood in 1942. After Lanza's discharge from the US Army in 1945, Garnell worked briefly with the tenor on his vocal technique.

Goldovsky conducted Lanza in his operatic debut (in the role of Fenton) in Nicolai's comic-fantastic opera The Merry Wives of Windsor at the Berkshire Festival on August 7th and 13th, 1942, and again in his second performance of a special staging of Act III of Puccini's La Bohème that same month. He was also one of several coaches who worked with the tenor at the Festival.

Although Goldovsky, in his 1979 memoir My Road to Opera, was harshly critical of the 21-year-old's Lanza's personality and inability to read music (and went on to make the bizarre and easily refuted claim that his operatic recordings were the product of studio trickery), he acknowledged that the tenor possessed a voice that was “gorgeous, unforgettable [and] out of this world,” and that he “scored a great hit with the audience when he sang the serenade from the second act [of Nicolai's opera].” Moreover, Goldovsky's claims that Lanza was “unteachable”—and that he therefore had no future in opera—are contradicted not only by many other conductors and coaches who subsequently worked with the tenor, but by the testimony of the former's own colleague at the Festival, Herbert Graf (see below), who was responsible for staging The Merry Wives of Windsor.

She later taught voice at the National Conservatory of Music of Mexico, where she became the teacher of tenor Francisco Araiza (1950- ). González (as Mimì) and Lanza (as Rodolfo) twice sang the respective roles of Mimì and Rodolfo, together with baritone James Pease as Marcello and sopranos Laura Castellano and Sheila Vogelle alternating as Musetta, in a special staging of Act III of La Bohème at the Tanglewood Music Festival in July and August 1942. Music critic Jay C. Rosenfeld subsequently reported that, “Miss Gonzales [sic] as Mimi and Mario Lanza as Rodolfo were conspicuous by the beauty of their voices and the vividness of their characterizations.”

Interesting side note: On October 17, 1960, González sang the role of Mimì opposite Giuseppe Di Stefano as Rodolfo in a production of La Bohème at the Teatro Florida, Mexico. The 19-year-old tenor who sang the small role of Parpignol that evening was Plácido Domingo.

and went on to write in Opera News in October of that year that Lanza was “a real find of the season . . . who made a great success as Fenton," and a tenor who “would have no difficulty one day being asked to join the Metropolitan Opera.”

In the 1960s, she ventured into occasional operatic appearances, and also appeared in stage productions of operettas and musicals. Grayson co-starred with Lanza in the tenor's first two films, That Midnight Kiss (1949) and The Toast of New Orleans (1950), and also appeared in concert with him at the Hollywood Bowl on June 24, 1948, singing “Thine Alone” from Eileen and “O Soave Fanciulla” from La Bohème in duet. Grayson and Lanza also performed on radio together in 1949, and sang in public that same year, as part of a promotional tour for That Midnight Kiss.

He worked with Lanza from 1949 to 1952 on three MGM films: The Toast of New Orleans, The Great Caruso, and Because You're Mine. Among their most notable collaborations were Agustín Lara's “Granada” and the Finale from Cavalleria rusticana, both of which were recorded for Because You're Mine. Lanza also recorded two of Green's compositions: “The Trembling of a Leaf” in 1952 and “Never Till Now” in 1957. In a 1977 interview with leading Lanza biographer Armando Cesari, Green stated that, “I was convinced when I was working with Mario [Lanza], and I still am, that the instrument itself—the voice itself—was the voice of the next Caruso. Mario had an unusual—very unusual—quality . . . a tenor with a baritone color in the middle and lower registers, and a great feeling for the making of music. A great musicality. I found it fascinating, musically, to work with Mario.”

He also conducted the Bavarian State Opera for two years and served as Associate Conductor of the Munich Philharmonic. In addition, he served as assistant in the early 1950s to the legendary Italian conductor Arturo Toscanini (1867-1957) during the latter's tenure with the NBC Symphony Orchestra. In June 1948 Grossman accompanied Mario Lanza, soprano Frances Yeend, and bass-baritone George London (and other singers) on the piano in a private performance of an extra from Act IV of Puccini's La Bohème. [Read about that performance and an interview with Maestro Grossman here].

In September 1958, he was one of several singers who collaborated with Lanza on a recording at the Rome Opera House of the “Gloria all'Egitto” scene from Verdi's Aida for the soundtrack of the tenor's final film, For the First Time. Guelfi sings the part of Amonasro to Lanza's Radames, and also appears in the equivalent scene in the film.

On July 2, 1946, he conducted Lanza with the Prom Symphony Orchestra at a concert in Toronto.The (Toronto) Daily Star subsequently reported that Hannikainen and Lanza “made it a most enjoyable concert,” with the latter “[revealing] a thrilling tenor voice singing arias from La Gioconda, Tosca, and the lovely 'M'Appari' from Marta.”

later the two men were reunited when Harrell sang the role of Ford to Lanza's Fenton in the first of two performances of Nicolai's The Merry Wives of Windsor at the Berkshire Music Festival in Tanglewood in 1942.