  The method of differential equations in canonical form has proven a powerful
tool for solving multiloop Feynman integrals. In this note we test this
procedure away from four dimensions. Namely, we consider the simple example of
a massless doublebox, expanded in dimensional regularization around six
dimensions. We achieve a canonical form for the relevant master integrals and
solve them in terms of harmonic polylogarithms up to transcendental order 9.
The integral basis of uniform transcendentality requires increasing indices of
propagators. According to the standard graphical jargon, this amounts to
decorating the integrals with baubles, like on Christmas trees, or rather loops
in this case. The results can be useful for studying amplitudes in six
dimensions.
