Middlesex & Herts Boat Services Moorings 

 Grand Union Canal Walk — associated with Grand Union Canal

An illustrated walk along the Grand Union Canal from London to Birmingham

 THE GRAND JUNCTION CANAL - a highway laid with water. — associated with Grand Union Canal (Grand Junction Canal)

An account of the Grand Junction Canal, 1792 - 1928, with a postscript. By Ian Petticrew and Wendy Austin.

 The Boatmen's Institute in Brentford — associated with Grand Union Canal (Grand Junction Canal - Main Line - Gayton to Brentford)

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Wikipedia has a page about Middlesex & Herts Boat Services Moorings

Middlesex (; abbreviation: Middx) is a historic county in southeast England. Its area is almost entirely within the wider urbanised area of London and mostly within the ceremonial county of Greater London, with small sections in neighbouring ceremonial counties. It was established in the Anglo-Saxon period from the territory of the Middle Saxons, and existed as an official administrative unit until 1965. The county is bounded to the south by the River Thames, and has the rivers Colne and Lea and a ridge of hills forming its other boundaries. The largely low-lying county, dominated by clay in its north and alluvium on gravel in its south, was the second smallest by area in 1831.

The City of London was a county corporate from the 12th century and was able to exert political control over Middlesex. Westminster Abbey dominated most of the early financial, judicial and ecclesiastical aspects of the county. As London expanded into rural Middlesex, the Corporation of London resisted attempts to expand the city boundaries into the county, which posed problems for the administration of local government and justice. In the 18th and 19th centuries the population density was especially high in the southeast of the county, including the East End and West End of London. From 1855 the southeast was administered, with sections of Kent and Surrey, as part of the area of the Metropolitan Board of Works. When county councils were introduced in England in 1889 about 20% of the area of the historic county of Middlesex, along with a third of its population, was incorporated into the new administrative county of London and the remainder incorporated into the administrative county of Middlesex, governed by the Middlesex County Council that met regularly at the Middlesex Guildhall in Westminster. The City of London, and Middlesex, became separate counties for other purposes and Middlesex regained the right to appoint its own sheriff, lost in 1199.

In the interwar years suburban London expanded further, with improvement and expansion of public transport, and the setting up of new industries. After the Second World War, the populations of the administrative county of London and of inner Middlesex were in steady decline, with high population growth continuing in the outer parts of Middlesex. After a Royal Commission on Local Government in Greater London, almost all of the area of the historic county of Middlesex was incorporated into Greater London in 1965, with the rest included in neighbouring administrative counties.

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