Hi Richard , neither Richard or Phoebe Nicklin were born on the Isle of Man. On the Isle of man there are only 4 burials in the name of Nicklin , all in Onchan :
Elizabeth , aged 81 , 24/3/1879 Hannah E , aged 75 8/8/1899 Richard , aged 71 , 31/10/1862 William , aged 2 mos , 1/6/1841.
There are two will that you can get from the LDS church :
1862 Richard 1899 Hannah E
From the site "Lawsons Micro Site" , IOM census indices :
1841 Eliza 40 Hannah 18 Mary 10 Pheabe (as spelt) 20 Richard 45 Richard 4 Sarah 5
1851 Elizabeth 53 Hannah 22 Mary 21 Richard 59 Sarah 19
1861 Elizabeth 35 Hannah E 62 Richard 69 Richard 27
1871 Elizabeth 73 Hannah E 40
1881/1891 no Nicklins on the IOM . some of the census ages are not correct or have been transposed !!
On the iGI , I found Richard Nicklin christened 9/9/1791 to William and Phebe , in "Old Mtg House - NC " , Dudley , Worcester , England .
And the following children to Richard and Elizabeth ALL in same place Dudley , Worcester :
Phebe Ann Virginia birth 4/3/1821 Richard birth 12/1/1823 (must have died before 1833) Hannah Elizabeth 30/7/1824 Elizabeth 1/4/1825 Mary 3/2/1828 (died 1/10/1829) Mary 27/11/1829 Sarah 2/12/1831 Richard 31/8/1833
ALL of the above births are from CHURCH RECORDS !!! Some members of the LDS church have posted these biths INCORRECTLY as the IOM and Staffordshire .
The only possible marriage for Richard I could find is to Elizabeth Rochardson , 18/6/1818 , Aston Juxta Birmingham , Warwick , England.
Hope this helps
David Dwyer Sydney Australia
There could of been more , as it looks like William buried was also their child , no record of his birth on the IOM.