there was a time where london's dogs were so Onerous they felt that it would be a good idea to pour oil over the water Have been wondering about this sentence

there was a time where london's dogs were so Onerous they felt that it would be a good idea to pour oil over the water Have been wondering about this sentence since I read it, it seems there must be multiple typos in it for it to make sense...eg "London's docks were so odorous..." (makes a kind of sense, during the Great Stink chemicals were dumped in the sewers to reduce the smell https://en.wikipedia.org/wiki/Great_Stink https://en.wikipedia.org/wiki/Great_Stink ... not oil I think though?). Is that the incident you meant?