Hi,
Not much help but this extract was on the following page
http://tyneareasc.org.uk/2010/10/a-story-of-four-tyne-built-paddle-tugs/The second steam tug was built 1864 at Willington Quay for T.A Dry & M.P. Martin of Willington Quay, and W.G Dry of Gateshead and named
“James Conley”. O.N. 49743. Wood hull paddle tug. One 30nhp side lever engine (cylinder 30″ diameter) 72 gross tons. Dimensions 81.8 x 17.1 x 9.1 ft. In 1866 she was sold to TSavin of Oswestry,(a railway construction contractor) and registered at the Port of Aberystwyth in 1866.
In 1871 she was resold to the Porthmadog Steam Tug Co.Ltd, and re-registered at the Port of Caernarfon, and continued to work for this company until 1884, when she was re-sold to S.Young of North Shields and re-registered at the Port of North Shields. She was sold a further two times, and was broken up in 1890.
Note - Thomas Savin was one of the contractors for the Aberystwyth and Welch coast railway, later Cambrian Railways.
In terms of records, the baptism shows the parents as Jones, but your relative was Williams? does it show an address?
In a lot of cases of Welsh Census returns, you'll find the children often carried their fathers forename as their surname, eg, in my tree, my 3xG Grandfather was Edward Jones. his "correct" name would have been Edward ap John, as his father was John Evans. John Evan's father was Evan Edwards, His father was another Edward Jones and so forth... this often throws trails into confusion...
If you can shed some more light with any addresses or anything, I'll see what i can see as most of my ancestry is from the Llanfrothen area with some living in Porthmadog.....