As Richard (the father of the 1773 baptism) and Mary (the mother of the 1770 baptism) were siblings, we can at least be almost certain that the grandparents of William were John VADLER and Elizabeth BOWLING, who were married at Battle on June 3rd, 1742.
Mary COPPER was a native of Sandhurst, Kent. She was born there on October 5th, 1775, and married there on December 29th, 1796. William at the time of his marriage was described as a bachelor of the Parish of Benenden.
William and Mary had a total of 9 children:
1. Mary - born: May 4th, 1797 at Sandhurst, KEN
bapt: June 4th, 1797 at Sandhurst, KEN
marr: October 7th, 1818 at Sandhurst, KEN
to: Charles MUMMERY
arr : (NZ) March 17th, 1841 aboard "Lady Nugent"
arr : (NSW) September 12th, 1843 aboard "Ann"
died: May 14th, 1875 at Jamberoo, NSW
bur : May 16th, 1875 at Jamberoo, NSW
2. William - born: April 18th, 1799 at Sandhurst, KEN
bapt: April 20th, 1799 at Sandhurst, KEN
marr: September 10th, 1820 at Sandhurst, KEN
to: Harriet WATERS
arr : November 5th, 1838 aboard "Maitland"
died: December 25th, 1881 at Jamberoo, NSW
bur : December 27th, 1881 at Jamberoo, NSW
3. John - born: September 19th, 1801 at Sandhurst, KEN
bapt: October 25th, 1801 at Sandhurst, KEN
marr: September 19th, 1826
to: Harriet ROUSLEY
marr: March 25th, 1836 at Rye, SSX
to: Mercy EILDEN
arr : November 5th, 1838 aboard "Maitland"
died: April 17th, 1892 at Jamberoo, NSW
bur : April 19th, 1892 at Jamberoo, NSW
4. James - born: August 10th, 1803 at Sandhurst, KEN
bapt: October 23rd, 1803 at Sandhurst, KEN
marr: May 11th, 1825 at Sandhurst, KEN
to: Hannah BOVIS
arr : November 5th, 1838 aboard "Maitland"
died: September 11th, 1884 at Jamberoo, NSW
bur : September 14th, 1884 at Jamberoo, NSW
5. Stephen - born: 1807 at Rye, SSX
bapt: October 30th, 1807 at Rye, SSX
marr: August 9th, 1834 at Sandhurst, KEN
to: Sarah BOVIS
arr : November 5th, 1841 aboard "Fairlie"
died: July 9th, 1885 at Jamberoo, NSW
bur : July , 1885 at Jamberoo, NSW
6. Kezia - born: October 14th, 1810 at Rye, SSX
bapt: November 18th, 1810 at Rye, SSX
marr: August 19th, 1831 at Westwell, KEN
to: George STEADMAN
arr : February 14th, 1842 aboard "Sir Edward Paget"
died: April 25th, 1894 at Cambewarra, NSW
bur :
7. Edwin - born: June 15th, 1813 at Rye, SSX
bapt: July 24th, 1813 at Rye, SSX
marr: August 9th, 1834 at Sandhurst, KEN
to: Mary BUSS
arr : November 5th, 1838 aboard "Maitland"
died: May 26th, 1895 at Jamberoo, NSW
bur : May 28th, 1895 at Jamberoo, NSW
8. Samuel - born: at Rye, SSX
bapt: February 23rd, 1816 at Rye, SSX
died: 1817
bur : 1817 at Sandhurst, KEN
9. Sarah Ann - born: January 1822 at Sandhurst, KEN
bapt: February 12th, 1822 at Sandhurst, KEN
arr : November 5th, 1838 aboard "Maitland"
marr: February 17th, 1840 at Wollongong, NSW
to: Joseph KNIGHT
marr: 1873 at Bolong, NSW
to: Isaac STOTT
died: May 13th, 1905 at Cambewarra, NSW
bur : May 15th, 1905 at Cambewarra, NSW
Following their marriage in 1796, William and Mary lived at Sandhurst until about 1805, when they moved to Rye. Vidler was a common name in this town, so it is possible they moved because of relatives, but this cannot be confirmed. In late 1816 or early 1817 the family moved back to Sandhurst, where they remained until leaving for Australia in 1838.
Mary died at Sandhurst in September 1829, and was buried there on the 29th. William subsequently remarried, to a widow, Mary Smith (nee Maynard), at Sandhurst on January 15th, 1832, and it was she who accompanied the family on the "Maitland" in 1838. (For details of the voyage of the "Maitland", see Bruce Fairhall's site.)
Subsequently, William and Mary had one son, Reuben:
10. Reuben - born: August 2nd, 1840 at Dapto, NSW
marr: June 27th, 1882 at Cambewarra, NSW
to: Mary CONDIE
died: November 2nd, 1910 at Cambewarra, NSW
bur : at Cambewarra, NSW
On arrival in NSW, William and his family settled first at Dapto, but very soon moved to Jamberoo. At this time, an attempt was being made to establish a hop-growing industry at Jamberoo, and coming from a hop-growing area of Kent, the Vidlers would have had this expertise.
Hop growing was not a success in Jamberoo, and like most other landholders in the area, dairy and mixed farming soon took over.
Descendants of William's children still live in the Illawarra area of NSW, although they have now spread to every state of Australia and overseas. The first large migration came in the last quarter of the 19th century, by which time the original farms in the Illawarra could not be economically divided among the members of the second generation, and males from this generation were encouraged to move to the Northern Rivers area of NSW, which was just being opened up. Once again, there are now many descendants living in that area.