Here is a copy of the birth/baptism entries from the Old Parish registers re the children of William Duthie and Isabella Burns I hope you find them of interest.
1943 CraigWilliam Duthie & his wife Isobel Burns at the Home Farm of Rossie had a child born the 9th September & baptized 22nd of same month nameArchibald
1845 MarytonJuly 10th William Duthie and his wife Isabella Burns residing at Gilrivie Parish of Dun, had a daughter baptized by the Revd Mr Thomson Free Church Minister Montrose, born on the 2nd current namedIsabella
1847 MarytonJune 13th William Duthie residing at Hillhead of Bonnytown and his wife Isabella Burns had a son baptized by the Revd James Dickson Free Church Minister Marytown, born on the 5th day of June current namedWilliam
1849MarytonApril 22nd William Duthie residing at Hillhead of Bonnytown and his wife Isabella Burns had a son baptized by the Revd James Dickson Free Church Minister Marytown, born on the 16th current, namedDavid
1851 CraigAugstWilliam Duthie & Isabella Burns, his wife at Kinne-ll had a child born 11th August and baptized 24thof the same month 1851namedMary Ann
1854CraigWilliam Duthie and Isabel Burns at Hillhead of Bonnington had a child born on the 15th November and baptized 22nd of same month 1854namedJames
The remainder of the children being born after 1854 would not be recorded in the Old Parish Registers, but in the Statutory Records now held at Edinburgh.