<apex:page standardController="Grievance__c" extensions="MrcCaseListController" recordSetVar="notes" sidebar="false" >
      <apex:pageBlock >
        <apex:pageBlockTable value="{!notes}" var="n">
                <apex:column headerValue="Case Note" value="{!n.Note__c}" style="width: 76%; padding:10px;vertical-align:top;" />

                <apex:column value="{!n.Contact_Date__c}" style="width: 6%; padding:10px; vertical-align:top;"/>

                <apex:column value="{!n.Contact_Type__c}" style="width: 6%; padding:10px; vertical-align:top;"/>

                <apex:column value="{!n.CreatedById}" style="width: 6%; padding:10px; vertical-align:top;"/>
                <apex:column style="width: 6%; padding:10px;vertical-align:top;">
                    <apex:outputLink value="/{!n.id}" target="_blank">
                        {!n.Note_Created_Date_Time__c}
                    </apex:outputLink>
                </apex:column>
        </apex:pageBlockTable>
  </apex:pageBlock>

</apex:page>

public with sharing class MrcCaseListController {

    public List<Grievance_Note__c> notes{get;set;}
    public Grievance__c mrcCase {get;set;}

    public MrcCaseListController(ApexPages.StandardController controller) {

        mrcCase = (Grievance__c)controller.getRecord();

        List <Grievance__c> mrcCaseList = [SELECT id FROM Grievance__c WHERE id =: mrcCase.id LIMIT 1];

        notes = [SELECT id,Note__c,Note_Created_Date_Time__c,Contact_Date__c,Grievance__c,Contact_Type__c,CreatedById,LastModifiedById
                    FROM Grievance_Note__c
                    WHERE Grievance__c = :mrcCase.id
                    ORDER BY Note_Created_Date_Time__c];

}

}