Odd Thought

I was reading somewhere, not to sure where it was now, but anyway I was reading about how in the late 1890's London's streets had a real problem with the waste material from all the thousands of horses that used the London streets back then.

Now my odd thought was where did all that horse manure go to, and who moved it all and when cars and buses started to come in and started to take over the jobs of the horses, what did the people who cleaned up after the horses do?

I know lots of questions, and when I did a Google it was not very good at giving me the sort of answers I wanted, for some reason it was far more interested in giving me results that lead me to stuff to buy, which not what I wanted, this is not the first time that I have been let down by Google, if this sort of thing carrys on I shall have to look at using a differant search engine.