Is there no direct logical correlation between 'I'm sending this follow-up letter to let you know that your support is greatly needed and appreciated by everyone involved with graduate Endodontics at IU.' and 'I have sent you another letter to let you know we need your help and we would be appreciative of it.', indicating neutrality?
I'm sending this follow-up letter to let you know that your support is greatly needed and appreciated by everyone involved with graduate Endodontics at IU.###I have sent you another letter to let you know we need your help and we would be appreciative of it.