Sub Macro1()

Dim wshO As Worksheet, rgO As Range '(O)rigin sheet and range
Dim wshD As Worksheet, rgD As Range '(D)estination sheet and range
Set wshO = ThisWorkbook.Worksheets("Murk 11A") 'origin sheet
Set rgO = wshO.Range("A1") 'origin range
Set rgD = wshD.Range("O38") 'Destination range
Set wshD = ThisWorkbook.Worksheets("Murk 11A") 'dest sheet
'Find last cell on dest range using column O.
'--- Copy Murk 11A!A1:O38 at end of data in "Murk 11A" ---


Set wshO = ThisWorkbook.Worksheets("T+M") 'origin sheet
Set rgO = wshO.Range("A1") 'origin range
Set rgD = wshD.Range("w89") 'Destination range
Set wshD = ThisWorkbook.Worksheets("T+M") 'dest sheet
'Find last cell on dest range using column W.
'--- Copy T+M!A1:W89 at end of data in "T+M" ---


Set wshO = ThisWorkbook.Worksheets("Murk 12C") 'origin sheet
Set rgO = wshO.Range("A1") 'origin range
Set rgD = wshD.Range("Q41") 'Destination range
Set wshD = ThisWorkbook.Worksheets("Murk 12C") 'dest sheet
'Find last cell on dest range using column Q.
'--- Copy Murk 12C!A1:Q41 at end of data in "Murk 12C" ---

Set rgD = wshO.Columns(1).Cells(wshO.Columns(1).Cells.Count) 'last cell
in col A: A65536.
Set rgD = rgD.End(xlUp).Offset(1, 0) 'last cell of data in A then 1 row
bellow.

'Now copy/paste
rgO.Copy rgD 'Syntax: OriginRange.Copy DestinationRange

'--- repeat above section ---
End Sub