Also, in page 452 [5], Heaviside wrote:

    div B = 0

Finally in page 475 [6]:

    div D = ρ

So yes, essentially all 4 Maxwell's equations were here.

[5] https://archive.org/details/electricalpapers01heavuoft/page/...

[6] https://archive.org/details/electricalpapers01heavuoft/page/...