Doctor Leopold Friedrich Dittmer was buried in a pyramid in Brodnica

Inscription reads:
Obiit Strasburgi d. 20 Aug 1832
Translated = He died in Strasbourg, Aug 20 1831

Charlotte Wilhelmine Emilie Titel was 20 (not 26) when she merried Leopold in 1825, so born 1805 (see marriage image)

Name:    Charlotte Wilhelmine Titel
Gender:    Female
Birth Date:    Mar
Baptism Date:    25 Mrz 1805 (25 Mar 1805)
Baptism Place:    Friedrichswerder Berlin,Brandenburg,Prussia
Father:    Conrad Wilhelm Titel
Mother:    Anna Caroline Fromm

Charlotte Wilhelmine Emilie Dittmer (born Titel, 1799) disappeared from German documents in 1862 - 1872. Did she go to Hugo in England?
She is in German documents in the years 1873 - 1884, but no traces after that.

Name:    Guido Ottokar Dittmer
Gender:    männlich (Male)
Event Type:    Taufe (Baptism)
Birth Date:    22 Mai 1825 (22 May 1825)
Baptism Date:    10 Jul 1825
Baptism Place:    Berlin, Brandenburg, Preußen (Germany)
Father:    Friedrich Leopold Dittmer
Mother:    Friederike Charlotte Emilie Dittmer
Legitimacy:    Ehelich
Parish as it Appears:    Brandenburg
City or District:    Berlin
Page Number:    417;417
Author:    Evangelische Kirche. Dom Berlin
Film Number:    70143

Aged 40 in 1871, Born Prussia (not Russia), Hamburg
Aged 74 in 1901, Born Germamy

A recerence on the internet (Deutschen Bund for April 1857) suggests  Hugo Adalbert may from Berlin and was arrested for criminal activity.

However, another "Biographical Information" reference with a matching date of birth has:
Dittmer, Hugo Adalbert Dittmer, Hugo Adalbert
Date of birth: 29/05/1826
Place of birth: [?] Strasburg (West Purssia)
04/05/1840 inclusion in the Latin School in Halle.

This second reference shows Hugo Adalbert Dittmer was well educated, which is consistent with him having a sucessful career as a shipping merchant.  However, both Strasbourg (on the SW border with France) and Halle, in East Germany near Leipzig are a long way from Hamburg (in the North), where the 1871 UK census had his birthplace.

Name:    Hugo Adalbert Dittmer
Gender:    männlich (Male)
Event Type:    Taufe (Baptism)
Birth Date:    29 Mai 1826 (29 May 1826)
Baptism Date:    7 Jul 1826
Baptism Place:    Strasburg (Brodnica), Polen (Poland)
Father:    Leopold Friedrich Dittmer
Mother:    Charlotte Emilie Dittmer
Legitimacy:    Ehelich
Parish as it Appears:    Strasburg
Page Number:    90;91
Author:    Evangelische Kirche Strasburg (KrSt. Strasburg, WestPreu¤en)
City or District:    Strasburg
FHL Film Number:    245661

Deaths Sep 1906   (>99%)
Dittmer  Hugo Adalbert  80  Bucklow  8a 121

Name:    Hugo Adalbert Dittmer
Age:    80
Record Type:    Burial
Birth Date:    abt 1826
Death Date:    abt 1906
Burial Date:    19 Sep 1906
Burial Place:    Manchester, Greater Manchester, England
Cemetery:    Southern Cemetery
Cemetery Section:    G
Grave Number:    1984
Cemetery Notes:    Not Consecrated

Probate:
DITTMER Adalbert of "Lisadel" Wilmslow Cheshire died 17 September 1906 Probate London 17 June to Percy Henry Adalbert Dittmer merchant Effects £877 7s 6d.

Publication:Manchester Courier and Lancashire General Advertiser
Publication date:Wednesday 19 September 1906
DITTMER.-On the 17th inst., at Lisadel, Wilmslow, Hugo Adalbert Dittmer, in his 81st year, today (Wednesday), at 2 p.m.

Assumed to have ben born about 1827 - 1828 (as there is a gap in the other childrens births).

Name:    Coeialie Adelaide Dittmer
Gender:    weiblich (Female)
Event Type:    Taufe (Baptism)
Birth Date:    22 Sep 1827
Baptism Date:    5 Nov 1827
Baptism Place:    Strasburg (Brodnica), Polen (Poland)
Father:    Leopold Friedrich Dittmer
Mother:    Charlotte Dittmer
Legitimacy:    Ehelich
Parish as it Appears:    Strasburg
Page Number:    114;115
Author:    Evangelische Kirche Strasburg (KrSt. Strasburg, WestPreu¤en)
City or District:    Strasburg
FHL Film Number:    245661

The death of Cecilia a few hours after her father's death was recorded in the book of deaths No. 7659/1, directly under the doctor at pos. No. 90. 

Name:    Anno Theobald Dittmer
Gender:    männlich (Male)
Event Type:    Taufe (Baptism)
Birth Date:    26 Feb 1830
Baptism Date:    4 Apr 1830
Baptism Place:    Strasburg (Brodnica), Polen (Poland)
Father:    Leopold Friedrich Dittmer
Mother:    Emilie Charlotte Dittmer
Legitimacy:    Ehelich
Parish as it Appears:    Strasburg
Page Number:    147;148
Author:    Evangelische Kirche Strasburg (KrSt. Strasburg, WestPreu¤en)
City or District:    Strasburg
FHL Film Number:    245661

Name:    Flo??de Emilie Dittmer
Gender:    weiblich (Female)
Event Type:    Taufe (Baptism)
Birth Date:    11 Apr 1831
Baptism Date:    22 Mai 1831 (22 May 1831)
Baptism Place:    Strasburg (Brodnica), Polen (Poland)
Father:    Leopold Friedrich Dittmer
Mother:    Charlotte Emilie Dittmer
Legitimacy:    Ehelich
Parish as it Appears:    Strasburg
Page Number:    164;165
Author:    Evangelische Kirche Strasburg (KrSt. Strasburg, WestPreu¤en)
City or District:    Strasburg
FHL Film Number:    245661