Mahler's arrangement of four Bach pieces - two each from the baroque master's Orchestral Suites Nos. 3 and 4 (BWV 1067, 1068) were prepared specially for a concert of the New York Philharmonic he conducted on November 10, 1909. Mahler's arrangement is quite unusual for its era and does not significantly depart from Bach's original in the forces required. Mahler's use of the harpsichord (he played the part himself at the premiere) is quite personal - adding the instrument to the orchestra a color more than the conventional continuo accompaniment function played in Bach's era. Mahler's re-working is itself within the Bach tradition as the Laeipzig master was no stranger at making adapations of earlier composers' works for his own concerts. This new study score is a digitally-enhanced reissue of the one first published by G. Schirmer in 1910. As with all PLP scores a percentage of each sale is donated to the amazing online archive of free music scores and recordings, IMSLP - Petrucci Music Library.