  I describe parts of my joint work with S. Deser [March 19, 1931 - April 21,
2023] which started when I was working as a post-doc at Brandeis University in
2001. Our work was mostly, but not exclusively, on conserved charges of higher
curvature theories of gravity. I also describe some recent developments, such
as expressing the conserved charges in terms of the linearized Riemann tensor;
I expound upon the computations. I also reminisce about our interaction for
over two decades that went beyond our scientific collaboration. The physics
part of this review is intended for graduate students and researchers
interested in extended theories of gravity, especially about the conserved
quantities and perturbative techniques in these theories.
