Despite the chaotic state of his affairs, and the debts which took some years to resolve, he left a great legacy.
In 1831, coastal duties on coal and slate were abolished, a cause for which he had fought for so long, and the revival of the slate industry began.
In 1836, the Ffestiniog Railway opened, largely following Provis' route of 1825, and using the Cob to reach Porthmadog Harbour.
43,000 tons of slate were exported from Porthmadog in 1845.
Porthmadog grew rapidly, but the scheme for Porthdinllaen Harbour foundered, superseded by Robert Stephenson's Britannia Bridge over the Menai Strait, which opened up the route to Ireland via Holyhead.
Tremadog did not grow much bigger, but has been studied by students of architecture and town planning many times.
The Bill for Catholic Emancipation, another aim for which he had fought, was passed in 1829, and the first reformed parliament, which had been one of the main thrusts of his political career, was convened three years later.

Madocks' wife returned to Tregunter, while the Tremadog estate was split up between those who had assisted Madocks in his schemes.
Williams continued to serve the local community, and organised a coming-of-age party for Madocks' daughter Eliza at Tremadog, in a style reminiscent of the great festivities on which Madocks was so keen.
Porthdinllaen is now owned by the National Trust, while much of the earlier 1800 embankment was used as the route for the Croesor Tramway when it was built between 1862 and 1864.
It is now used by the Welsh Highland Railway, and is regularly traversed by Garratt locomotives imported from the Alfred County Railway in South Africa.
Despite the chaotic state of his affairs, and the debts which took some years to resolve, he left a great legacy. In 1831, coastal duties on coal and slate were abolished, a cause for which he had fought for so long, and the revival of the slate industry began. In 1836, the Ffestiniog Railway opened, largely following Provis' route of 1825, and using the Cob to reach Porthmadog Harbour. 43,000 tons of slate were exported from Porthmadog in 1845. Porthmadog grew rapidly, but the scheme for Porthdinllaen Harbour foundered, superseded by Robert Stephenson's Britannia Bridge over the Menai Strait, which opened up the route to Ireland via Holyhead. Tremadog did not grow much bigger, but has been studied by students of architecture and town planning many times. The Bill for Catholic Emancipation, another aim for which he had fought, was passed in 1829, and the first reformed parliament, which had been one of the main thrusts of his political career, was convened three years later.
Madocks' wife returned to Tregunter, while the Tremadog estate was split up between those who had assisted Madocks in his schemes. Williams continued to serve the local community, and organised a coming-of-age party for Madocks' daughter Eliza at Tremadog, in a style reminiscent of the great festivities on which Madocks was so keen. Porthdinllaen is now owned by the National Trust, while much of the earlier 1800 embankment was used as the route for the Croesor Tramway when it was built between 1862 and 1864. It is now used by the Welsh Highland Railway, and is regularly traversed by Garratt locomotives imported from the Alfred County Railway in South Africa.
William Madocks