The inter-colonial service has been carried on regularly by the Huddart-Parker and the Union lines, while the latter has practically gained a monopoly of the inter-provincial and the Island services. [Illustration: Photograph of Auckland taken from a seaplane, showing the City's position between the two harbours, the Waitemata in the front and the Manukau in the background _W. A. Waters, Photo._] An industrial disturbance, which ended in a general strike, paralysing the trade of the Dominion, occurred at the end of 1913. The trouble began with the miners in 1912, but the strikes of the Wellington shipwrights and the Huntly miners, which took place simultaneously in October, 1913, brought out other trades, including the waterside workers, and for some weeks the commerce and industry of the Dominion were at a standstill. Even the city trams ceased running. After a fortnight, free labour became available and rapidly grew in extent. Within a month the city became normal. One of the features of the strike was the introduction of special police, who were enlisted to protect the free labourers. The Auckland special police included over 800 mounted men, who camped in the Domain. Although feeling between the unionists and the strike-breakers ran high, there was no conflict at any time. During the following years there were a number of industrial disputes, but in the war period strikes were not resorted to. The "go-slow" policy was, however, introduced during the later stages of the war, and caused considerable inconvenience. In 1919 the strike reappeared and coal supplies became so short that public conveniences, such as gas and electricity, were affected, and their curtailment became frequent. The railway services were also affected, only the briefest time-tables being carried out. In 1920 complete suspension of both trams and gas supplies occurred, owing to lack of fuel. On two occasions the trams ceased running--from January 31st to February 13th, and from September 25th to October 11th. Almost simultaneously with the second suspension of the trams the gas supply was entirely stopped, the period being from September 30th until October 14th. Another strike, which was not appreciated by the public, was the butchers' strike, which lasted from November 15th to December 6th, 1919. The jockeys' strike, which took place at the Avondale races on April 10th, 1920, was a small affair in itself, and would not merit mention if it were not for the events which followed it. On June 3rd the tramwaymen detailed for duty on the race cars refused to run the "race specials" and were suspended. The other tramwaymen, out of sympathy with these men, ran their cars into the depôts. The City Council, which had taken over the system from the Auckland Tramway Company, considered that the men had struck, and the service was not resumed until June 8th, when the dispute was settled.