MANUSCRIPT EQUATIONS, LIKELY ON GENERAL RELATIVITY, SHOWING THE MASTER AT WORK.
A series of equations, probably in connection with the background independence of the General Theory of Relativity, i. e. the equations' non-reference to a specific coordinate system.
The second equation in the first line of the manuscript is probably the so-called condition of harmonicity, usually attributed to V. A. Fock and de Donder, or its linear approximation, now commonly referred to as "Hilbert gauge".
Quarto, no place, no date. Slight traces of handling, otherwise well-preserved.