Sorry I do not have a Wiliam Bird Burman as a pilot on my lists.
Most of my pilots come from date from around the 1860's and later.
I do have on crew lists the following Burman's Would David be one of his
sons ?
David Burman 2nd and Bosun's Mate 1838 Swansea Wales Glamorgan
David Burman Mate Cert-30692 1840 Swansea Wales Antonio Vinent
NB ages or year of birth are always approximate, so that could also be him
saying born 1838
before he became a Mate.
To get details of David's certificate and qualifying seatime for the
examination
http://www.nmm.ac.uk/upload/pdf/masters_certificate_order_form.pdf
there is also Burman's on
www.welshmariners.org.uk a William Burman
Cert No. 28652 born Swansea 1837.
Thomas Burman Apprentice 1824 Clovelly England Richmond ?
Thomas Burman Apprentice 1825 Clovelly England Richmond ?
Regards
Bryan
www.swanseamariners.org.uk