Find most recent matching row and copy subsequent rows between workbooks

I have two workbooks, both with matching headers. Data is entered in one workbook (let's call it workbook1) on a row by row basis with a timestamp of when the data was entered. So each new entry is on the next row down from the previous one with an associated unique timestamp.

I need a macro in the second workbook (workbook2) that will find the row in workbook1 matching the timestamp of the latest row in its own sheet, and then I need to copy all the new rows that are below it in workbook1.

ie,

WORKBOOK1

MACHINE EMPLOYEE CAUSE TIMESTAMP
535A 123 Crack 12/12/2012 10:11
535B 123 Power 12/12/2012 10:15
61C 423 Damage 12/12/2012 12:23
535A 123 Crack 12/13/2012 09:53


WORKBOOK2

MACHINE EMPLOYEE CAUSE TIMESTAMP
535A 123 Crack 12/12/2012 10:11
535B 123 Power 12/12/2012 10:15

Macro needs to match '12/12/2012 10:15' from workbook2 with workbook1, then copy the subsequent rows to the end of workbook2:

61C 423 Damage 12/12/2012 12:23
535A 123 Crack 12/13/2012 09:53

I am rather stumped. Help would be greatly appreciated.

That is brilliant. Works perfectly. Well done sir.