All that can presently (October 2023) be gleaned about Mary Shakespear from sheet music covers and by Internet searching is that she was presumably an American actress/singer who has been featured on just 2 works published between 1912 and 1913.| Title | Attribution | Instruments | Source | Remarks |
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You're a Great Big Blue Eyed Baby (1913) | A.S. Brown (w&m) Mary Shakespear (perf.) |
Piano, Voice | Indiana |
| Title | Composer | Attribution | Items |
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That Old Girl of Mine (1912) | Egbert A. van Alstyne | Earle C. Jones (words)
Mary Shakespear (perf.) |
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You're a Great Big Blue Eyed Baby (1913) | A. Seymour Brown | Mary Shakespear (perf.) |